DC Plugs for AC Adapter: Everything You Need to Know

Did you know that there are different DC plugs designed for specific uses and applications? Some common types of DC plugs include barrel connectors, commonly used to connect laptop power adapters to computers, and coaxial connectors, which connect electronic devices to TVs, radios, and other devices.

What is a DC Plug, and Why Do We Need It?

A DC plug is a type of electrical connector used to connect a device that uses direct current (DC) power to a power source or another device. 

These often have two or more pins or prongs inserted into a matching socket or receptacle. The pins or prongs on the plug are connected to the electrical circuit inside the device. The socket or receptacle is connected to the power source or other device. 

DC plugs are commonly used in devices such as laptops, mobile phones, and portable devices that use rechargeable batteries.

These plugs connect devices that use direct current (DC) power to a power source or other device. Also, they enable the transfer of electrical power between two points, providing a safe and reliable way to connect devices to a power source.

Remember that DC plugs are necessary for many electronic devices and appliances because they provide a convenient and easy way to connect and disconnect the device from the power source. 

That allows for portability and easy replacement of batteries, for example, in electronic devices that run on rechargeable batteries. They also allow flexibility in designing and creating power supplies to better match a device’s specific requirements and ensure efficient and safe power transfer.

How Does the DC Plug Work with AC Adapter? 

A DC plug works with an AC adapter to convert alternating current (AC) power from a wall outlet or other power source into direct current (DC) power that electronic devices can use. The AC adapter is a device that contains a transformer, which is used to convert AC power into DC power.

When the AC adapter is plugged into a wall outlet or other power source, it draws in AC power and converts it into DC power using the transformer. The DC power is then output through the DC plug, typically inserted into the device that needs power.

As mentioned earlier, it has two or more pins or prongs inserted into a matching socket or receptacle in the device. These are connected to the electrical circuit inside the device. On the other hand, the socket is connected to the power source.

This allows for the safe and efficient power transfer from the AC adapter to the electronic device and provides power for the device to operate. That way, the AC adapter acts as a step-down transformer to change the voltage level from mains voltage to the voltage required by the device. This conversion allows electronic devices on DC power to run on the commonly available AC power in households and buildings.

DC Plug Details: Size, Polarity

When selecting a DC plug, there are a few details that you should consider to ensure that it is the ideal fit for your device and application.

As mentioned earlier, DC plugs come in various sizes, determined by the diameter of the plug’s central pin or barrel. Make sure to check the specifications of your device. Also, choose a plug that matches the size of the socket or receptacle on your device. 

DC plugs come in various sizes, typically determined by the diameter of the plug’s central pin, called the “barrel” or outer connector. Some of the most common sizes include:

5.5mm x 2.5mm and 5.5mm x 2.1mm

5.5mm x 2.1mm and 2.5mm x 5.5mm plugs are the most common size for laptop power adapters and other home electronic devices.

3.5mm x 1.35mm

It is a common size for small electronic devices such as portable music players and mobile phones.

Micro USB

This is the piece plugging into the micro-USB port on your tablet or smartphone. 

USB Type-C

It has two round pins that are unpolarized and ungrounded. The pins are often 18.6 mm apart and 17.5 mm apart at the tip. 

USB Type-A

Rectangular, slot-shaped USB type-A connectors are most typical and can be seen on peripherals, personal electronics, and computers. 

Other types of plugs are Waterproof male plugs, Waterproof female plugs, Audio pins, Buckle plugs, and Waterproof plugs among other things. 

On the other hand, the polarity of a DC plug refers to the positive and negative terminals of the plug and how they correspond to the positive and negative terminals of the device or power source. DC plugs can have one of two types of polarity: center positive (often abbreviated as “+”) or center negative (often abbreviated as “-“).

A center-positive plug has a pin or prong in the center that is designated as the positive terminal, and the surrounding barrel or connector is the negative terminal.

Relatively, a center-negative plug has the negative terminal in the center, and the surrounding barrel or connector is the positive terminal.

It’s important to check the device’s or power source’s polarity and choose a plug that matches that polarity. Using a plug with the wrong polarity can damage the device or power source or prevent it from working properly. So, it is essential to match the plug’s polarity with the device or power source to ensure a safe and efficient power transfer.

Tips And Tricks for Using a DC Plug

Below are a few tips and tricks for using a DC plug:

1. If you are traveling with electronic devices that use DC plugs, bring spare plugs and cables in case they are lost or damaged while you’re away.

2. Always disconnect the DC plug from the device or power source when it is not in use to prevent power leakage and save energy.

3. Make sure the cable is securely plugged in and not loose. That can cause the power to be disconnected abruptly or cause a power surge.

4. Keep your DC plugs and cables in good condition by avoiding over-bending or twisting them, and avoid exposing them to excessive heat or moisture.

5. Use quality and well-known brands, especially for electronic devices which require high current, because they are more likely to have good quality and compatibility with the device.

6. Please pay attention to the plug’s polarity and ensure it matches the device’s or power source’s polarity. Using a plug with the wrong polarity can damage the device or power source.

7. Always check the specifications of your device and the power source before using a DC plug. Ensure your plug is the correct size and rating for your device’s voltage and current.

By using these tips and tricks, you can guarantee that your DC plugs provide a safe and reliable connection for transferring power to your electronic devices and prevent any damage to your device, power source, or safety hazards.

What Do You Need to Consider When Buying a DC Plug for AC Adapter? 

When choosing a DC plug for an AC adapter, it’s important to consider the following factors to ensure that it is compatible with your device and the adapter:


Measure the diameter of the central pin or barrel of the DC plug, and compare it to the specifications of your device’s power jack to ensure that the plug will fit.

Voltage and current rating

Check your device’s voltage and current requirements, and choose a plug rated for the same voltage and current as the adapter.


Make sure that the plug’s polarity matches the power jack’s polarity. The plug should have the same center positive or center negative type as your device.

Connector Material

Look for a plug made with good quality materials such as copper, brass, and gold-plated connectors, as this can ensure a reliable connection.

Cable Type

Ensure that the cable with the adapter is the right length and has the right thickness and flexibility for your application.

Brand and Compatibility

A well-known brand or an original adapter from the device manufacturer is recommended. It can ensure compatibility and safety.


Look for a good build quality plug with no visible defects or wear and tear. That can ensure the reliability of the connection

Final Thoughts

To sum up, DC plugs provide a convenient and easy way to connect and disconnect the device from the power source. That allows for portability and easy replacement of batteries.

They also allow flexibility in designing and creating power supplies to better match a device’s specific requirements and ensure efficient and safe power transfer.

Remember that it will help if you choose a DC plug that is the correct size, has the correct voltage and current rating, and matches the polarity of the device’s power jack, as well as the right length and type of cable, and a brand and compatibility with the device or the adapter.

The correct DC plug is very important when buying an AC adapter. We hope you find this guide on DC plugs for AC adapters informative and useful at the same time. Remember these tips, so you are guided every time you use or buy power adapters with a DC plug. You are welcome to contact us by email or call us at +86 15013765242 if you need more help!

How To Test a Power Supply

Every professional technician understands that a stable, well-regulated power supply is required to perform consistent and reliable circuit and subsystem tests. However, what about testing a new power supply, converter, or regulator design? 

It’s not challenging to determine a faulty power supply as the main reason for an equipment failure. However, not all problematic power supplies have the same malfunction source. Frequently, overheating causes failure. Other times, it is a capacitor failure, and semiconductor failures are more frequent. 

Getting to the bottom of your power supply failure indicates properly assessing the component malfunction/s that caused it. A professional technician will depend on a good power supply tester or a multimeter. It’s a device that can run diagnostic tests to troubleshoot electrical parts. 

This post will explain more about that in detail. 

What Is a Power Supply and Why Do You Need to Test It?

Please don’t confuse a power supply with a power source. Remember that the source is the origin of incoming electricity. Often, the electricity source is a generator, battery, or outlet. The power supply converts the power from the source into the proper voltage and format.

Since a selection of options exists, the particular power supply function varies depending on whether it should convert or regulate energy. To better know what a power supply is and how it works, you should learn its components and their contribution to the device’s operation. 

Power supplies have integral functions in every model, with extra operations included based on the device type. Power supplies may need to modify the voltage up or down, regulate power for smoother outcoming voltage, or convert power to direct current. 

Also, getting a device with many features could cost you more expenses than you must spend. However, you need to get the features to avoid easily damaging the devices you need to power. 

After repairing and troubleshooting a power supply, load testing is essential. Repair technicians will use a multimeter and other tools to test the power supply against field conditions to gauge a series of vital variables. 

Guarantee repeatability 

Testing for repeatability guarantees the power supply does not immediately succumb to the same problem that brought it in for repairs, like a faulty diode. Also, repeatability indicates a unit is prepared to do as expected consistently. 

Confirm compliance against regulations 

Repaired power supply units should meet manufacturer and equipment supply load and power factor recommendations. Checking compliance against regulations indicates meeting OEM standards for functionality and safety, so there is no risk of liability if potential problems happen. 

Calibrate against a standard 

Load testing to a standard guarantees the supply is offering power at a rate consistent with the reading. For instance, testing against ten volts guarantees the power supply is putting out ten volts.

Calibrating against the standard also indicates sending the power supply back into the field along with the same performance expectations as the factory specified. 

Check performance 

Ensuring the repaired power supply working is only part of quality control. Maintenance personnel must perform a detailed check irrespective of any other concerns. 

A quick load test will determine whether the power supply is free of the original problems and can offer a constant current. 

Each of the above variables plays a crucial role in ensuring the long-time function of a new fixed power supply. 

Common Test Tools for a Power Supply

A power supply tester is an electronic device that tests how well a device functions. You do this testing as part of maintenance on a computer to determine the source of an issue.

It’s a handheld device with various plugs that you can connect to the power supply within a computer. Here are some standard testing tools you can use for power supply tests. 

Wand voltage meter

It is a costly specialty tester owned only by professional and licensed technicians. This is a numerical voltage tester with electrostatic wands that could measure and detect voltage by holding them in proximity wires or metal contacts.

Digital clamp meter 

This tool combines the function of the current sensor with a multimeter. It’s a little bit more pricey than a multimeter. It is a specialty tool that homeowners will require unless they’re working with advanced electrical work. 

You’ll find subtle differences in function between this and a multimeter. The most obvious one is that it boasts clamping jaws, which could grip wire conductors. That makes the tool easier and safer to use in other applications. 

Solenoid voltage tester 

Professionals often utilize this over a multimeter because of its ruggedness and don’t have batteries to monitor. Nonetheless, it is not as accurate as a multimeter for offering numerical measurements of how much voltage there is. Still, it’s less pricy than a multimeter. 

Both digital and analog models are accessible. These power supply testers have two wires, each with a probe spreading out of the tester’s probe. They announce the presence of voltage by vibrating or clicking. The more pronounced or louder the clicking is, the higher its voltage level. 


These are flexible electrical testers that can test numerous functions. Many multimeters can offer exact resistance, frequency, capacitance, continuity, and AC and DC voltage readings. Therefore, they can offer all the data other electrical power supply testers provide. 

Remember that multimeters feature a boxy body with analog or digital readout, a dial for setting the test function, and two long leads with metal probes at each end. Such testers could vary widely in accuracy and quality, and you will need to pay more for quality. 

These tools are way costlier than the basic testers. 

Continuity testers

It is a reasonable battery-powered device with a probe at one end, a cord with another probe at the other, or an alligator clip. A light on the tester’s body indicates other units also produce sounds if there’s a total circuit.

Compared to basic voltage testers, you can use continuity testers when a circuit is turned off or on devices or wiring connected to the circuit. They do not test for the voltage’s presence but to determine whether an electrical path is intact in a device or appliance. 

Plug-in circuit analyzer 

These cheap, simple-to-use testers could tell you more about the circuit’s function when you insert them into an electrical outlet. Such devices test grounded outlets with three slots. You can’t use them on older 2-slot outlets. 

Also, plug-in circuit analyzers feature three neon lights lighting up in various patterns to tell particular test results. A chart sticker on the device helps you understand the light patterns. Various light combinations suggest a properly wired outlet, an open circuit, a reverse-wired outlet, and the presence or lack of a ground connection. 

You can find more advanced plug-in circuit analyzers telling you the voltage and its circuit conditions. That tool does need recharging or batteries. 

Neon voltage tester 

Also called neon circuit testers, neon voltage testers tell you whether the voltage is present. They do not tell you how much voltage is there in the circuit. They also have a tiny body with a neon light inside, two short wire leads, and a metal probe on every end.

That device also doesn’t use a battery, which makes it a reliable tool. It is cheap, as well. It is a simple-to-use tool, but you should handle it with care. Accidentally touching either of the metal problems can get you a shock.

Inductance tester 

This tool lets you check for voltage in devices or wires without touching any electrical components. They are simple to use, safe, and inexpensive. 

The device is like a small wand with a tiny tip on the end, sensing voltage in switches, light sockets, lamp cords, circuit breakers, outlets, or electrical wiring. You can receive a reading by sticking the tester’s tip into the outlet slot or touching the wire’s outside or the electrical cable. 

A power supply tool is a specialized equipment that most people will not buy. Other power supply testers, like multimeters, allow you to test a power supply. However, the entire process can be more challenging. 

You can use these devices for different applications, but they are more likely to be a practical investment for somebody who doesn’t perform computer repair professionally. 

How Do I Know If My Power Supply Is Faulty?

If you have any of these scenarios, you may have a failing or faulty power supply. 

You hear clicking or buzzing sounds from the computer. 

That’s probably one major faulty power supply sign. Coil whine is a nerve-wracking dilemma in which you often hear a high-toned noise caused by electricity passing through the transistor. The thing is that it occurs when the GPU is under load. 

You can check if it’s coming straight from the GPU or the case’s back side, where you can find the PSU. It is probably up for some replacements if you hear any grinding or loud noise from the PSU.

You observed a burning plastic smell or smoke from the PC case 

Have you ever observed a burnt smell on any smoke from the PC? You certainly have some damaged components. If you notice either of these two, power the PC down immediately, open the case and check the PSU and motherboard for physical burn damage. Often. It might not be apparent, particularly if it’s the capacitor.

You’ll hear a loud bang when overloading a capacity, suggesting it stopped an electric surge.

Your other PC components malfunction or fail 

The worst thing that could happen is hardware damage to other parts. That is why a functional PSU is important in sending the proper power to the parts. Do you notice a pattern of hardware failure, like the PC case fans continuously dying even when it’s brand new? There’s a high possibility that a faulty power supply damaged it. 

Your device can not properly start 

It is the most obvious sign that your power supply is faulty. You may observe that when you try to power the device on, no fans begin to spin, although there’s nothing wrong with them. If the PC does not have flickering lights during startup, the PSU fan does not spin, or there’s no picture on the screen, it is obvious that the PSU is dead. 

What Makes a Power Supply Go Bad?

Without a final quality check against your load, a power supply could experience a broad spectrum of concerns, leading to user hazards and machine downtime for businesses. They include the following:

  • Doing an incomplete replacement or repair
  • Using the wrong replacement part
  • Doing the wrong component repair
  • Instant supply failure the next time it is used due to repair personnel 
  • Transients sent to peripheral electrical components caused by a failure to control current through the power supply. 
  • Shock hazards due to existing overvoltage or an electrical supply which goes beyond compliance standards. On the other hand, brownouts caused by the sag in the supply convert into issues keeping the electronics running. 

Testing against the load guarantees correct performance before the power supply breaks. And it provides a final quality check that is essential in keeping the function and safety of vital power supplies instantly after repairs and long into the future. 

What Are the Common Power Supply Problems?

Here are some of the common power supply problems you need to know so you know when to act: 

Missing external parts

Power supply performance could be affected by missing external connections or components. The version uses a specific circuit, mimicking a standard application. If there’s no similar circuit applied during testing, the performance may differ from what we mentioned.

Another oft-missing set of components is pull-down and pull-up resistors. You need these to ensure a known voltage for off/on. For instance, a pull-up resistor makes an extra loop around vital components. It provides a well-defined voltage that stays even when the switch is open. 

Meanwhile, a pull-down resistor will hold the voltage close to zero when a switch is open. 

Temperature problems

Falling either over or under the suggested temperature range for a power supply is a common problem causing issues for a power supply. Thermal limits guarantee the power supply runs within the range where you could account for its performance. 

Efficiency, EMI, regulation, and reliability can become issues outside the maximum and minimum operating temperatures. Most parts inside your power supply, like transistors, run at temperatures close to their thermal limits.

Running the power supply beyond its rated temperature could cause such devices to fail. Moreover, other power supplies enable an extended temperature range, especially when a derated or decreased output power exists. 

Reversed polarity 

This issue involves improperly connecting a power supply’s negative and positive outputs or inputs. Most parts can’t tolerate reverse polarity and will fail when subjected to it. You have reversed the polarity on the power supply’s output connections.

You may notice a damaged load, possibly resulting in power supply failure. The worst thing it may cause is a destroyed circuit or electrical fire.

You can use a diode to safeguard against this problem in lower-power applications. You can place it in a series or anti-parallel with the output or input. When in series and if the voltage is reversed, the diode won’t conduct and keep the circuit open.

The only disadvantage of this tactic is that the diode will disperse power proportionate to the input current. The diode will normally be off and conduct when the polarity is reversed, especially if you put anti-parallel to the input. Also, the diode will short and activate an overcurrent protection device, like a fuse or the power supplies OCP, once it conducts. 

Input undervoltage and overvoltage 

Both overvoltage and Undervoltage can be problematic for power supplies, and they are one of the most typical problems people experience.

The source for these is improperly setting the 120/120 Volt switch on non-universal input. That switch disables or enables the voltage-doubler inside the power supply. Therefore, the internal circuits run at 240 volts in either scenario.

If you set it incorrectly, the internal voltage will either be too low or too high, leading to failure. Remember that power supplies with universal inputs run across the full input voltage range without using a switch and do not have this issue. 

Typical sources involve powering down and up machinery, touching the power supply by a charged object, and lightning strikes. Many power supplies will have some amount of protection from such cases. Depending on the application, you may need more or less immunity to such disturbances. 

Final Thoughts for Power Supply Test

When a hardware fault starts to cause havoc on your devices, it can be challenging to determine what’s causing all the problems. With a few symptom checks and tools, you can easily diagnose your issues and determine whether the power supply is at fault.

Also, remember that safety is your number one concern. A power supply test will guarantee it’s safe to use.

Choose the Right Power Supply for Your Air Purifier

Keeping the air fresh and pure is a necessity nowadays. An efficient air purifier may help keep your home’s environment clean and fresh by removing toxic viruses.

Fortunately, different air purifiers are accessible in the market, but many brands provide vague explanations about their product’s efficiency or make freakish health claims. 

Air purifiers are not a magic bullet to improve your home’s quality, but the perfect air purifier may help you breathe better. Nowadays, it becomes more challenging for us to pick the ideal air purifier power supply.

But there’s no need to worry. Here we have provided a guide to help you choose the ideal air purifier power supply based on your budget and needs. 

What is an Air Purifier, and Why Do We Need It?

An air purifier sanitizes the air containing allergens, toxins, and contaminants. Essential oil diffusers and humidifiers that add particles to indoor air are the polar opposite of such devices. Air purifiers and filters work differently. Air purifiers can also sterilize particles, while the filters only eliminate them. 

Remember that an air purifier is a machine that removes pollutants from the indoor air and improves the air quality in your home, leaving the indoor space clean and contaminant-free. 

An air purifier eliminates contaminants from a room’s air to improve air quality. Dust mites, pet dander, ragweed, dust, pesticides, pollen, second-hand smoke, paint fumes, and mildew are only a few of the toxins that the air purifier filters.

Asthmatics, allergy patients, and anyone with an impaired respiratory system may encounter minor to major health concerns due to these particles. 

An air purifier can purify the air from a broad spectrum of allergens and pollutants, which can be difficult on a person’s health in the long term. The benefits of these devices extend beyond purifying the air from standard pollutants.

It removes smoke

Are you a smoker? Living in a wildfire-prone area? Perhaps you don’t have a well-ventilated kitchen in your home. An air purifier can help eradicate the smoke produced by cooking, forest fires, and tobacco.

Also, air purifiers with a dense activated carbon filter can eliminate the odor caused by any smoke, while a True HEPA filter will filter out any visible smoke particles. 

It captures mold spores.

Mold is a typical issue in most homes, and an air purifier can capture any airborne mold spores before they can reproduce. 

Air purifiers with an activated carbon filter, a True HEPA filter, and ultraviolet light are ideal for mold spore removal. That combination will lower the odor, capture mold spores, and destroy them at their core. 

It traps viruses and bacteria. 

Millions of small virus particles and bacteria can float around your home. Those pathogens and microbes can result in all types of illnesses.

An air purifier can help trap the bacteria as it flows through the system. Nonetheless, that’s not efficient for viruses. To get rid of those, you will like an air purifier with ultraviolet light, which ruins the DNA structure of such viruses, rendering them harmless to your health. 

How Does an Air Purifier Work with Power? 

Electricity runs an air purifier. As with any electric appliance, you must consider the power consumption of air purifiers.

You can run an air purifier 24 hours a day. That sounds quite a lot, especially if you look at it from your electric bill’s point of view.

Fortunately, air purifiers consume a manageable amount of energy. They have a maximum wattage of at least 40W and 200W (even the largest ones max out at 100W). That is for the highest speed settings. Also, you can run an air purifier on a lower 10-to-30-watt stage. 

Many air purifiers consume at least 8 watts to 56 watts. A fridge uses at least three to five times more energy. They ran air purifier magnets with about as much energy as an iPhone charger. 

The voltage is the first thing you must consider when picking or creating a power supply for your air purifier. What voltage does your air purifier needs? That one is quite simple.

If your air purifier needs 9 volts, you need a 9V power supply. If it needs 5 volts, then you need a 5V power supply. On top of that, if your air purifier requires a DC voltage (the most typical), you require a DC output from your power supply. If your air purifier requires AC voltage, you need an AC output. 

In other words, small Purifiers may use the AC power from the wall socket. Meanwhile, large air purifiers need AC adapters or special wiring.

How to Pick the Suitable Power Supply for Your Air Purifier?

An old maxim says, “use the right tool for the job.” However, frequently, there are numerous tools for the job. Thus, how do you know which one to utilize? 

You must understand a few basics to pick the ideal power supply for your air purifier. 

Power Supply Terms

Clarify some confusing terms, but they are essential in choosing the right wall adapter power supply. Linear power supplies versus AC-to-DC switching power supplies are sometimes misleading terms to those people who are not familiar with them.

A switching power supply takes an AC input but filters and rectifies it into DC first. It’s converted back into AC at a high switching frequency and steps down the voltage with a transformer. It’s fixed and filtered into a DC output. 

On the other hand, linear power supplies take an AC input, step down the voltage with a transfer, then rectify and filter the input into a DC output.

The main modification between these two is that they enable various components you can use. On the other hand, the linear power supply is less efficient and utilizes a heavier and bigger transformer and bigger filter components.

The switching power supply indicates higher efficiency because of the high switching frequency, allowing it to utilize a smaller, less expensive high-frequency transformer and lighter, less expensive filter components. Switching power supplies have more overall components and thus usually are pretty costly. 

Power Supply Current

The air purifier you like to power will require a particular amount of current. If you purchase one, it must indicate how much current it requires somewhere in the technical documentation or by the power connector. 

For instance, your device requires 1 ampere. That indicates you should pick a power supply that can provide at least a minimum of 1 ampere. 


Often, a power supply offers you several watts. Watt is only the voltage multiplied by the current. Therefore, if you have a 5-volt power supply that can provide a 1A of current, you will need a 5W power supply.

If the power supplies say 12V and 100W, you can figure out the maximum current by a basic calculation. 

Current equals the watt divided by the voltage. Thus, that’s 100/12 = 8.3A. 

Power Supply Voltage 

Another thing you need to keep in mind when buying a power supply is the voltage. That one is quite basic.

If your air purifier requires 9V, you need a 9V power supply. If it needs 5V, then you need a 5V power supply. 

On top of that, if your device requires a DC voltage, you need a DC output from another power supply. If your air purifier requires an AC voltage, you will need an AC output. 

Tips and Tricks for Choosing an Air Purifier Power Supply

You will find different uses of power in your daily life. Therefore, the demand for power product accessories like chargers, adapters, and LED drivers from Prowin Power is increasing.

Nonetheless, even though those products are accessible in the market at a high quality, people seldom talk about choosing the ideal power supply unit to power their air purifier. Those result in misuse, thus increasing the need for replacement.

Here are some tips and tricks for picking the best power supply unit for your air purifier. 

Ideal wattage for your system when selecting a power supply unit 

The initial step is to consider different ways to pick power supply wattage for your system. Each air purifier has particular power needs. When choosing, remember the minimum wattage rating for it.

You can utilize a decent power supply calculator to offer you an estimated figure when in doubt. The only drawback of picking too low wattage indicates your device will need more juice to power up, while extremely high watts might suggest you cannot use them. 

Consider wall outlets

You draw substantial power from the electrical grid when you plug an air purifier into the wall outlet. Remember that you can use a wall outlet to handle the big load of most appliances.

They also lessen tripping hazards, which are risky if something is wrong with either the plug or the outlet. Electrical appliances, generally, are better off plugged into a wall outlet. Furthermore, electrical appliances require a consistent flow of electricity that can warm cables as the day wears on. 

That is why it isn’t easy to plug in appliances in wet regions. That application could cause a power strip to overheat or trip the circuit breaker. Make sure you utilize a dedicated outlet when utilizing such machines. 

Verify the wattage.

Before connecting an extension cord to your air purifier, it’s wise to confirm its wattage to ensure you’re not straining the cable. You can do this by looking at the label of the extension cord.

Unless batteries power your air purifier, plug it into an electrical outlet. Plug-in air purifier versions have a fixed power connection attached to an electrical outlet while the devices operate. 

Choose the ideal extension cords.

When choosing an extension cord for your air purifier, there are some considerations you must pay attention to. 

Lower resistance and boost overall efficiency by using the shortest cord possible. The energy required to run the appliance increases when using an air purifier with an extension cord. That’s proportion to the extension cord’s length. Also, longer wires are more likely to become tangled, raising the risk of tripping over them. 

Choose an extension cable that is compatible with plugs having three prongs. Hence, the electricity is grounded, and no one will get an electrical shock. 

Avoid overloading the extension cables to lower the overheating and catching fire risk. 

Consider the length of the air purifier from the wall. 

For your air purifier to work properly, they need a massive space to draw in air and expel it into the room. When pressed against the wall, it can’t take in as much air as it would. It’s not simple to offer a conclusive solution to where you should place it. 

Place your air purifier in a good area for it to function properly. It will help if you consider other things, like positioning it near the source of pollution or ensuring it doesn’t cause problems with other equipment. 

If you have a portable air cleaner that you move from room to room, take it wherever you go. 

Final Thoughts on Air Purifier Power Adapter

To sum up, remember that you don’t need to put in a massive effort to create the power supply requirements you need for your air purifier if you use help from manufacturers and accessible resources.

Before any selection assessment, it is critical to determine your requirements. There’s a major difference between choosing what you need and what you’d want.

The power line of products from Prowin Power includes a broad spectrum of power supplies. We offer all your power source needs, from open/enclosed AC-to-DC power supplies, wall adapters, and table-top power supplies.

No matter which tool you pick as your power source, you can rest assured that you’ll receive top-notch products that are perfect for the job. 

Visit our website today to get started! We hope you find this post on choosing the right power supply for your air purifier helpful and informative at the same time. Now, you can choose the best power supply for your device! 

Power Adapters for Air Purifiers

12V0.5A 6W Power adapter or power board for Air Purifiers

36W Power adapter DC 12V/24V Output

Tips for ITE Power Supply

Are you one of those people looking for information on ITE power supply? Lucky for you because this guide has everything you need to know. Keep reading to learn more about this! 

What Is ITE Power Supply and Its Function? 

ITE stands for Information Technology Equipment. Such devices are basic cords and plugs, which you can buy for a wide array of computer or electrical equipment.

Information Technology Equipment is also a group or family, or product. It involves devices with the main function associated with data collection, storage, transfer, or processing. These devices predominantly produce an assortment of periodic pulse electrical waveforms.

Devices with only auxiliary data processing functions are under other product family groups. Usually, ITE equipment is low voltage in nature, under 600 volt-rated supply. 

A good example of ITE might be like:

  • network HUBs
  • drives
  • servers
  • printers
  • keyboards
  • monitors
  • telecommunications equipment
  • computers

Learning that numerous plugging accessories are out on the market can put your mind at ease. Plugs don’t seem to have a longer life span. That’s especially true if somebody trips over and breaks it. A dog chews in half, or a shortage burns it out. A demand for a stable and robust power supply plug will always be around. 

ITE power unit accessories range from various plugging extensions for various devices. Its excellent selection makes an ITE power unit stand above the rest. Every device’s cord or plug is available in their gallery.

Their strong plastic coating can have a longer lifespan if properly managed. ITE power supply is the benchmark for dependable plugs for any equipment. Without a proper power supply flowing through the veins of your computers, a single power surge could wipe out all your hard-earned work. 

Types Of ITE Power Supply 

In choosing an ITE power supply, you may choose between a wall mount and a desktop power supply. Each has pros and cons, and selecting the ideal ITE power supply will depend on your preferences and needs.

Wall Mount Power Supply

Wall mount power supplies include wall adapters, wall bumps, AC adapters, wall plug transformers, power cubs, and liner wall mounts, among other things. Regardless of the name, such power supplies are the most typical low-voltage power source.

They are composed of small plastic boxes, which plug straight into the wall. However, they come in a broad spectrum of quality and performance levels.

The wall-mount power supply is an excellent space-saving option. That’s because you only need to plug one end into the wall and the other into your electronic device. That also saves you energy and time. 

These power supplies could be either:

– Regulated or unregulated 

– Switching or linear power supplies

Desktop Power Supply 

When you need a power supply that offers much more power than a wall adapter, your ideal option would be a desktop power supply.

Desktop power supplies are similar to wall adapters in that they plug directly into the wall outlet and the device. These power supplies can offer more power than wall adapters and usually have various features and more agency approvals.

Remember that desktop power supplies normally have two components: the AC power cord and the actual supply with an attached DC cord. A desktop power supply may or may not come with an AC power cord.

It’s available in three standard types: a 3 Prong Mickey Mouse style cord, a 3-prong standard cord, and a 2-prong standard cord. 

As with a wall-mount power supply, an essential thing to check is the type of DC connector the device will require. DC output connectors include 2.5 millimeters or 2.1 millimeters x 5.5 millimeters outer diameter female, 3.5 millimeters, 5-pin, 4-pin, and 6-pin DIN male, and tinned and stripped wires. 

How to Choose the Right Type of ITE Power Supply 

ITE power supplies are a vital part of all electronic equipment. They offer regulated voltages and protection to your electronics, executing essential functions to accomplish a device’s intended use.

For instance, AC-to-DC power supplies serve as an interface and offer isolation between the hazardous alternating current of the power utility and the needed low-voltage direct current.

Choosing the perfect ITE power supply is essential for a successful product. The continuous goal of increased efficiencies, reliability, and density requires a thorough check of power specifications.

Temperature, load, input voltage, product life, and cooling are essential considerations. So are meeting standards for regulatory environmental impact compliance, Electromagnetic Compatibility, and standards for safety. 

Safety requirements

Today’s ITE power supplies should meet rigorous safety requirements and performance testing, adhering to different EMI and EMC standards. For example, medical equipment should meet medical equipment safety regulations.

In most cases, power supplies for ITE or commercial equipment don’t deliver the performance medical devices require in terms of product life, reliability, and safety. 

On top of safety regulatory requirements, EMC and EMI are defined for medical equipment as a collateral standard to the safety standard for most nations (Europe and North America) by IEC60601-1-2.

The standard determines EM emissions and immunity requirements. Consider different levels of interference immunity as their acceptance criteria for the immunity requirements.

For instance, it may be reasonable for a product to lose power momentarily during an electrostatic discharge or AC mains surge as long as it recovers. In other scenarios, it can continue operating without the event’s effect. 

Consequently, stipulating an immunity standard without determining a level and acceptance criteria is insufficient and useless. 


Determining a power supply requirement requires detail, thoroughness, and knowledge of what kind of ITE power supply is ideal for the application. For instance, is an external versus an internal power supply required?

An external is a stand-alone product with its enclosure, AC input connector, and output connector. Internal power supplies, meanwhile, are embedded in their equipment.

Each has pros and cons: performance, convenience, size, and cost are all important things to consider. 

AC input 

The type of AC input is something you must consider. A Class I AC input features three conductors (earth ground, neutral, and line). A Class II input features two conductors (line two or neutral and line) and doesn’t have an earth ground.

Remember that Class II products are more universally acceptable, as some end users might not have an AC source with an earth ground. Nonetheless, Class II products need extra levels of EMI filtering and insulation. 

They may cost more due to the challenge of achieving the needed performance output without an earth-ground reference. 

Reliability and product life

These two are related but different. Reliability is measured when it comes to operation, failure, and probability. MTBF (Mean Time Between Failures) is a reasonable figure of merit when comparing products. 

On the other hand, product life refers to component wear-out mechanisms and isn’t affected by the MTBF estimation. Thus, go for product-life data and reliability data. 

A computer ITE power supply can be reliable but lasts more than a few years of constant operation. At the same time, medical ITE power supplies last about 5-10 years or more. 

Installation Tips for ITE Power Supply

So, you have picked out your power supply and are ready to install it. You will need a standard head screwdriver and a well-lit place to work. If your office or home is prone to static electricity, you might also like to use an anti-static bracelet. 

Before you go any further, ensure you don’t open the power supply’s metal casing. There are high-power capacitors inside, which can kill or injure you if they discharge. For the same reason, do not stick wires or tools inside the exhaust or cooling fan holes. 

Remove the old power supply. 

Power down the PC and remove all the data and power cables. You’ll like to eliminate any access panels from the case. On a standard ATX case, those are on the left and right sides, held in place with screws on the computer’s back.

Remove the screws, pull back the access panels, and set them aside. 

A form factor or other non-standard case will help if you consult the manual. Remove the exterior panels as you can to offer yourself maximum access to the interior. You will also need to unplug the power cables from different components. 

Determine all the components plugged into the power supply. That will be the motherboard, case fans and radiators, graphics cards, drivers, storage drives, and CPU. 

Check from both sides of the PC and multiple angles. Excess lengths of data cables and power cables are stored behind the metal motherboard mounting try. 

If the power supply is modular, remove the power rails from the power supply housing’s back. If it is not, pull all the power rails to the most accessible space and ensure they are free of entanglements. 

Installing the new power supply

Put the new power supply in position in the PC. Do not plug anything into it if it’s modular. If it’s not, trail the power cables outside of the PC for simple access.

Position the exhaust fan on the bottom or top of the ITE power supply away from the motherboard and internal components. Point the exhaust fan at the top of the case. If it’s bottom-mounted, point it down. 

Secure the power supply to the PC’s rear case with the retention screws. Use the screws from the recent power supply if you are replacing it, or else the screws must have come with either the ITE power supply itself or the PC case. 

After fixing the power supply, plug in all the cables. As you plug them in, know where you run the power cables. The PC inside does not have to look like a showroom, but ensure the data and power cables do not trail near the cooling fans. 

Once you’re confident everything is good, move your PC back to its position with your monitor, keyboard, and mouse before closing up. Please don’t touch any of the interior components while it is running. Then, plug all and power it up. 

If everything looks great, unplug the external cables, close up its access panels and screw them into place to get the PC ready for operation. 

Tricks For the ITE Power Supply


Always consider the safety class

When mounting the power supply, it’s essential to observe the needed clearance and creepage distances to the equipment enclosure to all supply faces. The Class I system will guarantee 3-4mm between the earthed metal part and any part of the ITE power supply. 

But that will depend on whether the end application is medical or industrial power supplies, necessitating the use of insulators around the power supply assembly. 

Where you use a Class I power supply to the ground connection is a vital part of its safety system. Ensure it’s properly connected to the system safety ground.

If you use a Class II power supply, the clearance and creepage distances may be needed to be bigger in metal enclosures. Even though often, the equipment enclosure is non-conductive where they use such units. 

Thermal management 

Open-frame ITE power supplies may have a higher power rating when the connection is cooled, force air-cooled, or even both. With any air cooling, the mounting position surrounding the space and surrounding parts is unique to every application. Hence, it’s essential to check the operating temperature of your components after installation.

That guarantees that the safety components don’t exceed the maximum ratings and that the service and reliability aren’t impaired. 

Electromagnetic compatibility 

Open-frame AC-DC power supplies often need two or three mounting positions so you can connect them to the ground. You need one of these connections for safety grounds in a Class I system. You can find it on the input side of the assembly. 

The output common-code capacitors are vital to the EMC performance of the power supply. Ensure you connect it for optimum EMC performance, where the equipment utilizes a metal enclosure that is rarely a problem.

In plastic enclosures, either Class II or Class I configurations, it’s important to make other provisions for connecting such points to guarantee EMC compliance.


There are so many details to consider for the I.T.E. power supply. Take the above guide to start purchasing the power supply or power adapters. Prowin Power offers a wide range of I.T.E. power supplies with safety standard approval, contact us now for more details.

Laptop Power Adapter Replacement

Do you have a broken laptop power adapter? Then you’ll run out of battery eventually and be unable to use your precious laptop. Nonetheless, fixing a broken charger isn’t easy since opening a charging brick could start a short circuit and bears the danger of electrocution. 

Users without experience should not try to fix a broken laptop power adapter. If you have a broken power adapter, you must replace it or get a professional to fix it. Nonetheless, if the damage is in the cable and you’re in a pinch, you might be able to replace the damaged cable. 

The two most common causes of a non-functional charger are repeated and excessive bending and botched electrolytic capacitors in the charger circuitry. Hence, you’ll need to fix either the circuit or cable to fix the broken laptop power adapter. 

This post will help you learn everything you need about laptop power adapter replacement. Without further ado, let’s get started. 

What to Do When Your Laptop Power Adapter Stops Working

Are you currently experiencing a problem where your laptop’s power adapter isn’t working or isn’t correctly working? You can do a few crucial things before purchasing a new one. 

Check the power adapter and the power outlet. 

Even though it may sound obvious, the power adapter could also become loose even without knowing.

If it’s partially plugged in, it can make it seem like your power adapter isn’t working. However, it may not be receiving power from the wall outlet. If you’re in doubt, an excellent way to ensure it’s plugged in properly is to disconnect and reconnect it to the plug. 

Check the power adapter indicator light. 

Most laptop power adapters today feature a power adapter light on the adapter brick. Make sure you check for that indicator light; if there’s one, ensure it’s lit up with a green light. 

Remember that a power indicator means that your laptop power adapter is receiving power. 

Plug the adapter correctly into the laptop 

Even though it may seem apparent, the power adapter could easily become disconnected from a laptop. Instead, the power brick should firmly connect to the computer to receive the power.

There’s often a small metal pin in the adapter’s tip or the connection on the laptop. Ensure that pin isn’t broken or bent, as it can cause an issue with the computer getting power from the power adapter. 

Check the adapter brick connection. 

Many laptop adapters come in two pieces. Ensure both of those pieces are securely and firmly connected. The two parts connect at the rectangular box piece, often known as the brick. You can check the connections by disconnecting and reconnecting the cables. 

Check the wall outlet. 

Other wall outlets need a light switch to be active in the “on” position. Newer condos, apartments, and houses feature that kind of wall outlet. 

If the light is on, check the wall outlet is working. You can use a voltmeter to computer the power output and confirm the outlet is working correctly. 

You can also thoroughly check the circuit breaker and ensure nothing is turned off or stripped. 

Laptop power connection port 

Remember that the power connector connects straight to the laptop’s motherboard, often through one or more solder points. If the solder point has broken away from the motherboard or the solder point is damaged, it stops the laptop from getting power from the power adapter.

Fixing that needs precise work, replacing the power connector itself, or soldering the power connector back into the motherboard. In some situations, this type of concern is not repairable and needs a replacement of the power board or the motherboard. 

If you believe that may be your concern, it is best to handle it with professionals who may need to take apart your laptop to check the hardware. 


Are you determined that the laptop power adapter isn’t working correctly, and you are eager to replace it? It’s time you get a replacement from your laptop manufacturer.

You can also opt to buy a universal AC adapter from an online or local electronics supplier. 

How to Find the Right Replacement for Your Laptop

Not all are aware of it, but you risk frying up your laptop’s internal components by using it with an electrically non-compatible power adapter.

Many laptops have become an integral part of our modern life. We want to prepare for your business pitch and presentations even when you’re traveling. Buying a laptop power adapter is not a difficult task. Still, it can soon become a frustrating task if you are unfamiliar with your device’s power requirements and do not know how to pick the proper adapter for your laptop. 

Here are some factors you need to consider when buying a new laptop power adapter.

Pick the right type of charger.

You will find numerous types of chargers accessible in the market. For example, you can purchase a wall charger if you use your laptop in one place, like your office or home.

But if you’re traveling a lot, you must go for a travel charger or GaN charger. It will help if you also purchase a solar charger if you’re an adventurer or outdoorsy type. 

Choose the suitable type of connector. 

That should not be an issue for most laptop models, but it’s always wise to check for potential hardware compatibility problems before you purchase any electronic device.

Many of the newest laptops accept an octagonal, barrel, or cylindrical hollow connector and a central pin. Such types of connections have many distinctions. 

For instance, Dell XPS L502x users should purchase a charger with a connector of 7.4mm X 5.0mm. Choose one that is compatible with the charging slot of your laptop. 

Verify the needed power ratings.

Note that the laptop power adapter you’ll purchase has two different specifications—output and input.

The input specifications are connected to the power source’s specifications that the adapter will accept. Meanwhile, the output must connect to the input (DC) that your laptop will take. 

Therefore, if you know the connector is compatible with the laptop, you don’t need to consider the input power source’s rating. 

Please choose the suitable power cord and its length. 

Power cords are available in four types based on the kind of power plug standards for various regions: the European Union, Australia, the UK, and the US. Pick the kind of power cord compatible with your region’s power sockets.

Most retailers will provide you with a power cord based on your shipping address if you purchase it online. If you prefer to use it in another place than the shipping address, make sure you let the seller know about it as soon as you place the order. 

The worst case could happen if you find that the power plug doesn’t belong to your location, but the adapter meets the rest of your requirements. Under those circumstances, you can buy an adapter plug to start using it. Problem solved!

Most retailers sell power adapters without a power cord. That allows you to select a short or long power cord, per your preferences.

Added features 

Most universal and third-party chargers have added features such as an extra-long power cord, USB ports, etc. Hence, if you are open to purchasing such power adapters, check out all the accessible options.

You might come across something that more than meets your requirements. 

Tips For Prolonging the Life of Your New Power Adapter

Your laptop power adapter is a vital part of your unit, as it keeps the computer running on top of recharging the battery. Even though this important part of your laptop wears out and needs replacement, you can extend its life—which is essential, as adapters can be costly to replace. 

Pick a suitable adapter.

All laptop adapters are not the same. Make sure you check your laptop’s voltage. Compare that to the adapter cord’s voltage in which you’re interested. If the voltage is extremely low, it won’t power your laptop or will short-circuit.

That’s especially true if you bring your device outside the country. Many outlets that power laptops outside America take 100 to 240 volts.

Take proper care of the power brick. 

The power brick is the black box in the center of your laptop power adapter. It’s a sensitive piece of equipment, not to mention it’s a substantial part of your adapter. The component also receives the electrical charge and lets you know your laptop is on.

Make sure you safeguard it by not jarring it or dropping it.

Grasp plug directly 

Never pull straight on the cord to unplug your laptop. Keep in mind that pulling on the card will not just potentially cause damage to your laptop power adapter, but it could bring irreplaceable damage to you. 

Also, you could incur an electric shock or a house fire by improperly unplugging the adapter. To avoid that, grab and hold the plug itself. 

Avoid pinch points 

It would help if you did not run the cord through pinch points. That may involve a window, a door, or between a wall and a desk. That may not just disrupt the current flow, but it also ruins the wiring inside your laptop power adapter.

Stay away from too much heat. 

Always keep your power cord in a cool place. It will also help if you stop placing it near heat sources like heaters or electronic blankets. Remember that heat could travel into such sources, damaging the sensitive wiring in your adapter cord. 

Check for objects

If complex objects like laptop cases or books are lying on the adapter cord—the impact is the same as that of a bent water house. That could choke the current flow in the cord, keeping your laptop from powering on. 

It would help if you kept your power adapter as straight as possible to prevent damage to the wires. 

Are you a busy person who often uses your laptop most of the time? Then it is time for you to become more practical. Take note of the above tips. It is beneficial information that will help extend the life of your battery.

Where To Buy a Laptop Power Adapter

The easiest way is to purchase it from your laptop manufacturer. Just get in touch with your laptop supplier and tell them that you need a newer power adapter for your laptop. 

Look for the original charger model online. 

Look for the model number of your power adapter. You can go through the text written on the power brick. It will help if you remember the charger’s current ratings, voltage, and power. 

If you can’t find the mode number, go through the laptop’s manual or read the laptop’s description available on the laptop manufacturer’s website. 

You can find dozens of types and models of laptop power adapters on online platforms like eBay and Amazon. You can also look up in-flight DC power adapters or get a replacement adapter for your device.

You can find these adapters in the laptop power adapters and chargers category. Online retailers also sell many laptop power adapters and provide more options in price range and features. 

However, when purchasing a power adapter online, remember that you must pay for the shipping fees, and the brands are often not as well-known as the recognizable adapter brands seen at your local store. 

Visit your local laptop retail store.

You can also ask your local retailer if they have the particular power adapter for your laptop. If possible, make sure you check the charger before purchasing them. 

Universal laptop adapters are often available at most computer and big-box electronics stores. 

How Much Should You Expect to Pay for A Replacement Adapter

Laptop manufacturers normally sell such as AC adapters to replace broken, lost, or stolen models. Usually, power adapters sold through the manufacturer cost at least $20 to $50. 

Laptop power adapter kits that work with most laptop models cost $50 to $100. Unlike the power adapters made by the manufacturers, most come with various assortments that fit different laptop power ports. On the other hand, Apple laptop power adapters cost $79 or above. 

Comparison of Different Types of Adapters on The Market Today

Laptops often depend on two power adapters for energy: a DC adapter and an AC adapter. These adapters, also called chargers, convert the electricity from your wall outlet into a usable form for your laptop.

DC Adapters

Laptops utilize DC power, so it does not seem like a DC adapter is needed when plugging into a DC power source. Nonetheless, many sources of DC power offer a voltage that is too low for your laptop’s needs.

Remember that a DC power adapter is needed to take that power and convert it to a higher voltage, which your device can utilize to charge its battery or run. Moreover, DC power sources include solar power panels, batteries, in-flight outlets, and cars. 

AC Adapters

An AC adapter converts AC power from the wall outlet seen in most homes to the DC power utilized by many small appliances. For example, DVD players, computers, mobile phones, and laptops utilize DC power.

It is the type of power provided by batteries that many laptops utilize to keep working when the owner is mobile.

Remember that you will find an AC symbol with AC power adapters. Meanwhile, the DC power adapter has a DC symbol. So that’s one way to differentiate the two. 

Universal Power Adapters

Another alternative for laptop owners is a universal power adapter. Such adapters are costlier but can adapt to any power voltage or source. Supposedly, these universal adapters can work on any model of laptop.

That makes them somewhat practical, particularly among people who travel a lot and never realize where their next power source is coming from. One of the cool things about universal power adapters is that they come in a broad spectrum of connector types to fit a variety of laptops. 

Most laptops use different connector styles, so finding the best laptop adapter to fit can be challenging. 

Final Thoughts

Laptops are mobile devices that need adapters and power cords to charge their batteries. Another crucial thing while choosing and buying a laptop power adapter replacement for your unit is to check for its power rating and connector compatibility with your device. You are good to go if those two specifications are similar to your stock charger. 

Not only will you enjoy using your laptop for a longer time, but you will also be more productive—gear up your laptop adapter with these important tips. 

There you have it! We genuinely hope you find this post engaging and helpful. Are you ready to buy the best power adapter replacement for your laptop? Feel free to contact us if you need any help!  We wish you the best of luck on your next laptop power adapter purchase.

How to Import a Power Adapter from China: Full Guide 2022

Are you considering importing a power adapter from China for your business? Here’s a complete rundown for importing Chinese products that you must know. 

Many business owners are easily overwhelmed by the seemingly complex process and regulations of importing wholesale power adapters from China. That’s why importers tend to shy away from Chinese products.

Nonetheless, that can be a big missed opportunity for their business. 

The profit margins of wholesale power adapters from China are comparatively higher. That would help your business build more substantial success! So let us shine a light on what seems to be a confusing and dark importing process for most people. 

This definitive guide will go through every nook and cranny to help you better understand the different fundamentals of importing power adapters.

What You Will Need: Things to Consider 

You do not want your imported goods to be stuck in Chinese customs. According to Chinese import regulations, the goods are categorized as permitted, prohibited, or restricted. Thus, look at China’s official list of restricted and prohibited goods. 

One of the essential things you need when importing from China is import documents. These are the letters and forms accompanying a certain consignment getting into the country from a foreign destination. 

Below are the documents you need to start importing from China.

  • Bill of Entry – This is a legal document filed by customs clearance agents or importers before or upon the shipment’s arrival. This has all the information about the merchant, consignment, country of origin, and types of goods. 
  • Commercial Invoice – It’s a primer document that helps identify customs duty during clearance. 
  • Health Certificate – A legal document approving the commodity, especially beverage and food material, suitability for animal or human consumption. 
  • Test Report – A document showing that the commodity meets the quality standards the authorizing agency or government sets. It’s a mandatory document for certain imports. 
  • COO Certificate – A document that proves the imported products were manufactured and obtained in the particular country of origin. 
  • Technical Write-Up – A document proving details of the purpose or function of the imported commodity. The paper will allow the customs authority to derive the exact market value for import duty. 
  • Purchase Order – A document or letter issued by the creditor. It’s also an assurance of the merchant honoring payment to the exporter in completing the transaction. 
  • Insurance Certificate – An important document that shows support against the suppliers regarding terms of delivery. It allows the customs department to confirm and identify the payment amount for import duty. 
  • Import License – The legal document issued by the government authority of a specific region approving the importation of particular commodities into its terrain. 
  • Bill of Lading – A document that a carrier issues to the individual consigning the items as an acknowledgment receipt for a freight shipment. 

If you work with Prowin, we will help you prepare all the export papers. All you need to do is import custom clearance and wait for the arrival of the cargo. 

The Process of Importing 

For most companies, China is the preferred third-party manufacturing place. From electronics to hairpins, you can import practically anything from the country. 

Nonetheless, importing goods from China is easier said than done, particularly if you are doing it for the first time. As a newbie buyer, you may sometimes find the entire process complicated and daunting.

However, equipped with the proper knowledge and information, you must be able to import goods from China efficiently. Here are the tips to help you start importing goods from China without hassle.

Here is the step-by-step guide to importing a power adapter from China:

  1. Understand the relevant regulations in your region. You will need import rights before bringing power adapter imports from China into your country. 

For instance, importing from China to the US, you will need numerous permits for business and personal imports. In addition, the import should meet all federal standards, which differ among agencies and goods. 

If you’re importing to the EU, importers should register as economic operators to legally import to EU nations. You will then receive an Economic Operator Identification number. Make sure you do yours through research on that matter.

Most import regulations apply to goods imported for commercial or business purposes. Only the customs authority could make judgment calls about what qualifies as personal use. 

Numerous suits that are identical or several similar power adapters will have a difficult time passing the credibility test. 

  1. Determine the products you wish to import

Trade companies make money by selling products. Picking the wrong products indicates you’re losing money and time. To be an efficient and successful importer, you must first choose the right product for reselling.

You also need something that’s going to stand up if you’re going to put your name behind it. Thus, find something to be proud about selling. After all, your products define your business. Your products are your business!

Your primary consideration is selecting a product you can sell. Often, picking products you would purchase or at least know about would be smart. Further, the products you sell are essential to everything you do. 

They will impact your marketing, profit margins, and the design you employ. Legal restrictions and logistics are important too.

Ensure you have researched and understand a market or niche for the products you plan to import. On top of that, you must understand roughly how much your product must cost to make an adequate profit. 

Gather data about the products you wish to import. Get descriptive literature, product samples, and product composition information whenever possible. 

That information will be essential when it comes to identifying the tariff classification. That tariff clarification number (HS code) will be utilized to determine the rate of duty, which will be applied to your products.

  1. Make sure the products you want to import are allowed into your country.

Specific goods are not permitted to be imported. For example, various nations have different prohibited goods. Also, ensure that the goods comply with particular rules and regulations. 

Importing unsafe goods which fail to meet health code requirements or violate restrictions could end up costing you money in penalties and fines. 

  1. Categorize your goods and compute the landed cost

Identify the ten-digit tariff classification number for every product you are importing. Remember that such numbers, along with the Certificate of Origin, are utilized to identify the rate of duty you should pay when importing. After that, you can do the land cost calculation. 

Pay close attention to the Incoterms and calculate the total landed cost before placing an order. 

Getting landed costs earlier is essential because no one wishes to lose customers or earnings. If it is higher than expected, look for ways to mitigate the cost elements. You can start the process if it is in line with your budget. 

You may not know the specific costs of something until your shipment arrives. In such scenarios, you need to estimate your costs as precisely as possible. Get estimates from the suppliers you work with and look at costs from previous shipments to get an idea of how much you will need to pay. 

Unexpected fees that might come up during shipping lead to fluctuations in the total landed standard cost. Determine as many of your expenses beforehand as possible, but an informed estimate could go a long way.

After getting your actual, final costs, settle them against your utilized estimates. 

  1. Find the supplier in China and place your order.

Place your order with the exporter, shipper, or vendor and determine the shipping terms. After picking the supplier, request a Quote Sheet for your potential purchases to include the harmonized system number, value per item, and description. 

For instance, if you’re importing from China and the nearest port to the supplier is Shanghai, you must ask for FOB Shanghai terms. 

Remember that shipping by sea is slow. That means it requires more long-term planning than domestic product purchases. On top of that, the time needed to export goods, including customs clearance, inland travel, documentation, and terminal or port handling for a container of goods, could cost up to seven days. 

We suggest placing an order at least three months before you need your items at your door. 

  1. Schedule the cargo transport 

Many costs are linked with shipping goods, such as packaging, container fees, terminal handling, and broker fees. Consider each of those factors to get a complete picture of shipping costs.

Once you’re happy with the freight quote, provide the supplier’s contact details to your chosen freight forwarder. They will take it from there. The freight company will keep in close touch with you and your supplier, ensuring the shipment transportation is safe and fast. 

Take note that delays might happen during the process. Your goods might not be shipped on time, the vessel might not sail as scheduled, or customs might hold your goods. Always be ready and plan accordingly. 

Don’t expect the cargo to leave the port as soon as your products leave the factory. It takes at least one to two days for your cargo to be transported from the factory to the port. Also, the customs declaration process needs your shipment to stay at the port for about one to two days. 

  1. Track your freight and prepare for the arrival

Shipping goods overseas takes time. For instance, if you ship your power adapter from China, it will take around fourteen days to reach the West Coast and thirty days to reach the East Coast. 

The consignee will receive a notification with an arrival notice within five days or less of port arrival. When the shipment reaches the United States, you must file entry documents for the goods with the port director. 

The entry documents you need are the following:

  • – A bill of lading that lists all the items to be imported
  • – An official invoice listing the country of origin, purchase price, and tariff classification of the goods imported
  • – A packing list detailing the imported belongings
  • – The freight agent presented an arrival notice
  • – You can speed up the clearance process of your goods through the border if:
  • – You show the exact amount of each item of goods in every box, case, and container
  • – You put labels and numbers on every package
  • – You show the numbers on your invoice opposite to the itemization of goods contained in the package 
  1. Get your shipment 

When your power adapter goods arrive, please arrange for your customs broker to clear them through customs. If everything goes well, you are responsible for picking up your shipments. 

If you pick a door-to-door service, you can wait for your shipment to arrive at your designated address. 

Things To Watch Out For Import the Power Adapter

Despite the increasing labor costs and recent trade tensions, China is undoubtedly the premier manufacturing location for most importers. But it makes sense to start importing from China, especially for inexperienced eCommerce sellers like you.

However, even though online sellers have been importing from China for years, they will encounter numerous challenges with Chinese suppliers. Most misconceptions persist about importing from China and efficiently handling product quality there.

Also, many understandings with Chinese suppliers result from unclear requirements, poor communication, and poor preparation. Below are the things you need to watch out for when importing from China. 

  • Avoid getting counterfeit products.

This one goes without saying. But shockingly, many online sellers still think importing counterfeit products from China is a great idea. Remember that there is no future in importing fake products, even if you can import them cheaply and make a decent profit first. 

Also, importing counterfeit products will only expose your power adapter business to legal repercussions and risks from customs officials and platform operators. 

Most platform operators have launched vital anti-counterfeit programs in response to complaints about counterfeits from government agencies and third-party sellers. 

There are plenty of other products to import from China. Do not put your business in the line of fire by purchasing counterfeits. 

  • Avoid choosing untrustworthy suppliers.

Your job as an importer is to ensure the quality of the power adapter products you import. This means you are accountable to customs should anything go wrong with your import. And you are responsible if your products cause harm to any customers. 

It is essential to pick dependable suppliers from China. 

Before signing an agreement with a supplier, ensure you have researched its production process properly. That indicates understanding where it gets its materials from and even talking to other importers dealing with the said supplier or importing the same products. 

You may also like to personally take a trip down to the production ground for added assurance. Consider bringing an expert who knows the production process of the power adapter product you are importing and can advise you on possible issues that may come up. 

  • Timing is everything 

When transporting goods from China to overseas, you must look for a logistics company familiar with the various transport routes. Providers with online platforms are the fastest and cheapest transport option for you.

You can compare prices, dates, and means of transport and book the ideal option for you directly online: it’s as simple as taking a flight on holiday. 

For sole traders who don’t import the same amount of goods, it’s often challenging to find the perfect carrier, negotiate reasonable prices and track the good’s route. 

Therefore, look for a logistics company that can handle these steps for you or do transport planning as smoothly as possible. 

  • Don’t ignore the quality audit. 

Searching for information about Chinese suppliers online can be challenging since official databases lack English resources. If you have the budget, this is where a third-party audit of your power adapter supplier’s facilities can help.

Third-party auditing companies can visit your supplier’s facilities, confirm their operations, and cross-check business documents and licenses against official Chinese databases. 

Most third-party audits are also based on the international standard ISO 9001. Such audits usually evaluate:

– Engineering, research, and design capabilities

– HR recruitment and training practices

– Any lab testing capabilities

– Incoming quality controls, finished goods, and during production controls

– Quality management system organization 

– Equipment maintenance

– Basic production facilities 

Also, third parties can check a product sample for you, helping you prevent the delays and fees resulting from shipping a sample overseas. 

  • Don’t assume the supplier knows your product requirements.

Ecommerce suppliers are shocked that their Chinese supplier does not understand their product requirements.

You might assume your product requirements make sense. However, do they make sense to the average production staff? What about someone from another region? 

Inexperience with your product type, cultural differences, and language barriers can all result in misunderstandings with Chinese suppliers. 

A common misunderstanding that sellers encounter with Chinese suppliers includes those about:

– Labeling and packaging

– Measurements

– Intended product use 

  • Don’t ignore quality control. 

Sourcing a high-quality power adapter from China is possible only if you plan. Preparing to import from China can be as simple as a few steps:

– Research your market and determine a suitable product. 

– Assess potential suppliers’ legitimacy and capabilities.

– Set clear quality and product requirements.

– Inspect the order before shipment to guarantee compliance

Most eCommerce sellers do not think they have the resources or budget for a thorough quality control program. However, they fail to grasp that they are losing business in the end by ignoring quality control in the short term.

Ecommerce competition is fiercer than ever. Solid quality control processes will help prevent negative reviews, distinguish your power adapter products from your competitors, and drive them up best-selling lists. 

How To Find a Reputable Supplier

Finding a reliable supplier in China for interested importers is difficult. Considering the different electronics businesses in the massive country of China, plus the huge language barrier, looking for the perfect supplier can be a tedious task.

But it’s not impossible. There are a few ways to go about your power adapter supplier hunt. Below are tips for you to consider.  

  • Look for wholesale power adapter suppliers online.

Visiting China alone to meet with potential wholesale product suppliers may not be a brilliant idea, particularly if budget and time are a concern. When faced with that situation, your best option is to look online for wholesale suppliers from China. 

You can find numerous Chinese electronics suppliers on websites like DHgate, Aliexpress, Global Source & Made in China, Alibaba, or even Google. 

But if you don’t want to waste your time searching for one, Prowin has made an all-inclusive list of some of the best power adapter manufacturers in China. Please visit our blog on Top 11 Power Adapter Manufacturers in China

  • Go to China and find a supplier in Shenzhen. 

Suppose you only have the resources and time. In that case, you can visit China to find the array of electronics products in the electronics category. One of the big cities that you must drop by is Shenzhen. 

Also known as the electronics capital of China, Shenzhen is densely populated with massive electronics wholesale markets. That’s because most Chinese electronics manufactured are built in Shenzhen or its nearby cities. 

  • Attend trade shows and fairs for electronics products

Other excellent places to find Chinese suppliers are electronic fair shows, trade events, and exhibitions. 

Final Thoughts

Importing from China can be a profitable, exciting, and challenging endeavor. But we hope this article has provided everything you need to know about how to import a power adapter from China. 

Best of luck in your journey! Stay safe! And if you are looking for a dependable and trusted power adapter supplier in China, Prowin might help! Contact us today to get a free consultation! 

Prowin is a reliable and award-winning time of professionals with expertise and know-how in the power supply industry’s marketing research, R&D, and customization. With nearly 10 years of proficiency in the business, we strive to innovate and create the best power supply solutions for our global customer base across a wide array of markets. 

Get in touch with our friendly team to learn more about our services!

How to Choose the Right Power Adapter Supplier

Are you searching for a power adapter? Don’t know how to find your way in the middle of a jungle of suppliers? 

Sourcing the best power adapter is crucial in producing a great and successful electronic product. In the world of electronics, where numerous fake parts are prevalent, you should find the most dependable supplier. After all, procuring counterfeit parts can lessen the quality of your products or even destroy them.

Components with high-quality materials guarantee the dependability and durability of your product. However, before you can find the perfect power adapter supplier, there are a few things you need to bear in mind. 

This guide will help you throughout this process. So keep reading to learn more! 

What to Look for When Choosing a Power Adapter Supplier

Here are the essential things you must consider when selecting an AC supplier or factory:

Look for an electronic manufacturing service (EMS).

An EMS partner operates and controls sections associated with designing, building, and trying out electronic devices and their parts. They can help you source electronic parts for your power adapter.

Are you ordering components in large quantities? An EMS partner can help you get discounts on your order. They can also see disruptions that sourcing services and search engines cannot see. 

Determine if they have a good reputation for fulfilling orders. For example, what does their client list look like? How dependable are the suppliers they use? 

Your EMS partner must have solid relationships with various trusted suppliers. That will help them have backups when the supplier of your choice does not meet the agreed deadline. Also, be familiar with their processes, which will help prevent unnecessary surprises. 

Work with a power adapter supplier that can match your order volume.

Only pick a supplier that puts you and your business first. It won’t be easy to meet the set deadline in a different scenario where sourcing experts from established companies order from a small-scale supplier. 

Only work with a supplier whose values are similar to your business’s. Working with a power adapter supplier who can match your order volume can lessen your anxieties, especially when your items start to deplete. 

A good power adapter supplier will work to get you a fair market price.

A good supplier would know the power adapter industry inside and out. They also contact several suppliers for each component and have a structured way of comparing their offers.

Follow these steps, and you will get a reasonable and fair price of what other suppliers are charging for the same component today. 

The term “best” here may not indicate the cheapest, as the supplier will consider wider aspects of the potential suppliers. This includes:

  • – their capability to deliver good components consistently
  • – their reliability test results
  • – their components are certified 
  • – and more 

Still, your goal is to get a reasonable price from a suitable power adapter supplier, not only the lowest price on the market from a supplier who may be far from looked-for. 

A good supplier will take action to guarantee you receive a consistent supply. 

A power adapter supplier cannot be considered the best for your requirements if they cannot offer you a continuous supply. 

A great consultant should take behind the scenes to guarantee you receive a consistent supply from your new supplier. 

  • – Make sure you screen the supplier based on their answers to your questionnaire.
  • – They must provide you context so you can pick your first and second options for every type of component.
  • – As an extra screening step, interview those with the best options and get them to confirm if they are eager to sign a legally enforceable manufacturing contract. 
  • – For critical parts and those to be bought in significant volume, you can send an auditor to the supplier’s factory. Again, the final vetting stage will help you lessen the risk of receiving inconsistent quality. 

A good supplier will offer strategies to help you get components that are in high demand.

A great consultant will help recommend how you can find components that are in demand these days. Note that particular components may need to be sourced in advance to secure supply for the rest of the year or to lessen the risk of further pricing increases. 

How to Find the Best Price on Power Adapters

Most people often get confused. Power adapters look the same, but why would their prices differ? Below are the factors you must consider to find the best price on power adapters. 


Power is the crucial factor that impacts the price of a power adapter. Adapters offering the same power are in the same price range.

For instance, the adapter charging your phone can cost a few bucks. However, those providing significant energy to industrial machines are worth tens of thousands of dollars. 


Unlike a display screen, a small-size power adapter is cherished by all. A smaller adapter needs a more exquisite circuit and electronic components to provide the same power, resulting in higher costs.

Temperature and heat dissipation 

Heat control is another crucial component of a power adapter. Of course, an adapter will generate heat due to the current heating effect. Unfortunately, the heat will also impact the components and even ruin them.

Quality cooling elements determine the capability of heat control and impact the price. 

Output dynamic response

Electronic devices aren’t always running at full load. So you need a power adapter that can adjust its output power. A quality adapter can have a short response time and puts up the price. 

Input voltage

An adapter that can handle an enormous input voltage range will have a higher price. That’s essential for mobile phones and tablets.

The Benefits of Buying from a Reputable Supplier

Working in the power supply industry means you should only utilize the highest quality of products and services. A low-quality product can cause severe impacts on your production line. By choosing a reputable supplier, you remove all those uncertainties.

Working with a trusted and established power adapter supplier has several benefits. Here are a few examples:


Working with an authorized supplier, especially for power adapters, offers you a guarantee of product quality. In addition, you know that you will get 100% original products with a long shelf life. 

Cost reduction 

Another major advantage of choosing a reputable supplier for your power adapter business is that it will help you with cost reduction. A great supplier is involved in the initial phases of your product’s design and manufacturing.

That way, they can enhance the overall manufacturing cycle and prevent anything that might raise the total costs of manufacturing. 

Strengthens the quality of your product

You know that using poor quality products will make it impossible to create a good quality product. That’s why purchasing the best quality parts should be the ultimate goal of every supplier.

Choosing the best supplier is of utmost importance as they will be responsible for providing you with all the raw materials for your power adapters. 

Builds your reputation 

A supplier may be involved in the earlier manufacturing stages, but their services affect the final product. Their goods and services are utilized to manufacture the product that you also offer to your potential customers.

Thus, selecting a reputable supplier means you get the best material for manufacturing, which will also help you establish your reputation by providing the best products to the customers. 

Tips for Choosing the Right Power Adapter for Your Needs 

The best power adapter can make up juicing your electronic devices a piece of cake no matter where you go. Also, you can travel wherever you want and still be able to power your precious gadgets without trouble. 

AC Plug/Cable

Since it’s their most popular choice, people often use the term AC adapter interchangeably with power adapter. Nonetheless, those are two different things.

An AC adapter makes use of alternating currents to power the devices. It concentrates on drawing power from the main supply and works with an AC-compatible device. 

DC Plug

Unlike AC, DC adapters utilize direct current to power devices. It specializes in converted charges. A DC adapter’s design supports the use of particular devices. 

Connection Mode

Another critical factor in power adapters is the connection or plug connected to the electrical socket. Several countries make use of different connection modes or plug types.

For instance, you can find the three-in plugs in Britain. On the other hand, flat-pin or two-pin plugs are more accessible in the United States than three-pin ones. 

Therefore, pick a plug type based on your particular region or country. If you are an avid traveler, opt for universal adaptors to fix this problem. 

Universal Adapter 

As the name indicates, a universal adapter is versatile in compatibility. It can work with different plugs and voltages. Therefore, you don’t need to buy separate adapters for different voltage and device ranges. 

Universal adapters are a standard option among travelers who are uncertain about the kind of power outlets that will be accessible. Hence, universal adapters get called travel adapters. 


If you check a power adapter carefully, you will see a particular voltage range on the product label. That means the adapter is compatible with that specific level, expressed in volts or voltage.


Power supplies also deal with changing voltages and currents damaging your devices. A few adapters feature protection against power surges. Their circuitry design shuts the system whenever an unusual supply gets detected to lessen the damage. 

How to Save Money on Your Next Purchase of Power Adapters

A reliable power supply will keep your gadgets running long enough. However, numerous models on the market have different capacities, providing an array of features, some of which are expensive. 

To save money on your next power adapter purchase, you must figure out what you need and find a perfect place to purchase it at a discount. 

Here are some money-saving tips to help you. 

Look for discounts

Shop around before making your next big purchase. The benefit of buying from a power adapter supplier instead of a general retailer is the quality of advice and information you receive. 

Know what you like and what you want to avoid 

As with any device, all power adapters are not made equal. Here is what you want in your power adapter and must steer clear of. 

Match your device rating

The most crucial thing is to ensure your power adapter’s output matches your device rating. For instance, suppose your device needs a 9V DC, 2A adapter. 

That means you should not purchase a power adapter with a higher voltage than 9V and a lower current rating than 2A. You will only damage your device if you buy a higher voltage. 

It’s essential to learn the voltage requirements of your devices and the voltage ranges of the region you’ll be traveling to (if you’re traveling). Various nations have various voltage ranges.

Since there are universal sets of standards of voltages and power, it becomes essential to determine the wattages and voltages of the devices. 

Also, plugging the devices into power adapters not designed for your devices may cause damage to your gadgets. It may also lead to serious burns and fires. In most cases, your device’s output and input voltage requirements are mentioned on the packages or at the bottom of your gadget. 

Consider the sockets and plugs.

There are different sockets and plugs made for various appliances. In addition, other plugs are made exclusively for specific regions, while others are typical in most countries.

To purchase a plug adapter, ensure you make some effort to understand the sockets and plugs utilized in a specific region and their compatibility with your devices.

In such situations, look for adapters that are plug changers and not voltage converters. 

Avoid buying your power adapter at the airport. 

Imagine yourself at the airport and discovering that you left your adapter home. Make sure you bring it with you, or else you will have to land up in an unnecessary and expensive bargain at the airport. 

Pay attention to the pins.

Most people pick up their adapters in a hurry, especially those travelers, and fail to notice the number of pins. Different adapters are only compatible with 2-pin plugs,

That’s okay for charging tablets or smartphones. However, bigger devices such as MacBooks have 3-pin plugs. Skipping that detail could indicate your laptop is out of commission for your trip. 

Time your purchase

You will likely pay the sticker price if you wait to buy something until you need it. However, you can save big bucks with advanced planning. First, ask yourself when the item will go on sale. Black Friday sales are an excellent time to score popular and expensive items. 

Why You Should Shop Around and Compare Prices Before Making a Purchase

When searching online or browsing for a power adapter, adding items to your cart is simple without much thought. Nonetheless, there’s a great reason why you must prevent this. 

Most websites have made a sense of urgency to motivate you to purchase quickly, but there are often better deals. Here are a few reasons you must always compare prices before buying.

Outdated prices may fool you.

It is not uncommon even for Amazon to have listings with outdated prices. You will find many power adapters released two years ago, bearing the launch price tags, while they’re probably available at half of that price by now.

You may find better deals from another supplier.

The competition has pushed retailers towards selling at low-profit margins. Manufacturers already do the same. 

That means the power adapter you’re trying to purchase may not offer you the best value, especially if you’re eager to try out a new brand. 

Quality differs 

There’s almost a change in the quality, just like the price changes between sellers. Because sellers are not sourcing their goods from the same place.

Is product quality important to you, and do you not mind spending more money? Ensure you compare the quality of the power adapter you are buying. 

You will find better options.

You may have wanted a simple power adapter for your smartphone. But you may end up with a new power adapter and free accessories if you search for better options. Sellers are eager to up their sales through different marketing tactics, which can often work in the customer’s favor.

You will rarely find a product that does not come at a better price or with a combo offer by another seller. Therefore, ensure you do your research first and maximize all deals accessible. 

Final Thoughts

It may take some time and research to find the best power adapter for your needs at the best price. Still, putting in this effort will pay off with peace of mind. 

Now that many individuals work at home occasionally, it’s crucial to find the best power adapter products you can provide to all your customers. PROWIN POWER with a team that can help you to get the right power solution, which is a good choice for importing the power supply.

We hope you find this guide informative and helpful at the same time. Finally, we wish you the best of luck in your journey to find the right supplier! 

Power Adapter: Everything You Need to Know(Full Guide 2022)

Our devices are part of our daily essentials, and we rely on them in all aspects of our life. But to keep them running, we need to charge them regularly. It is where power adapters come in – they act as a go-between from the outlet to your device, translating the current so that it doesn’t fry your electronics.

While most of us don’t think twice about the power adapters we use, there’s much to know about these devices. This article will give you everything you need to know about this crucial little gadget.

What is a power adapter?

A power adapter is a device that takes power from an AC outlet and converts it into DC power. Generally, the power adapter contains a rectifier that changes the AC into the DC. The transformer then changes the voltage to become compatible with the device you are trying to charge.

This process is necessary because most electronic devices run on DC power, while AC power is what we get from our outlets. A wide variety of power adapters are available, but they all serve the same purpose – to power our devices.

The adapter will have plugs that fit into your device’s port. Several power adapters are available depending on the gadget in use. For example, there are power adapters for laptops, cell phones, digital cameras and other electronics.

Power Supply AC Plug

An AC plug is the attachment on the end of a power cord that goes into an AC outlet. Generally, there are three AC plugs – the two-pronged, the three-pronged, and the polarized plug.

The two-pronged plug is the most basic and oldest type of plug. It has two metal prongs – one is hot, and the other is neutral. The hot prong carries the current into the device, while the neutral prong returns the current to the outlet.

The three-pronged plug is similar to the two-pronged pin but has an additional ground prong. When a short circuit occurs, the ground prong creates a path for electricity to follow, reducing the shock risk.

The polarized plug is the most common type of plug today. It has two prongs – one hot and one neutral – of different sizes. The larger prong is always hot, while the smaller prong is always neutral. It helps to ensure that the current flows in the correct direction and prevents the risk of shock.

Power Supply AC Plugs differ depending on the country. US plugs have two flat prongs that are parallel to each other. EU plugs have two round prongs placed side-by-side, and UK plugs have three rectangular prongs arranged in a triangle. Au plugs have two flat prongs placed at an angle, while Koren plugs have two round prongs placed side-by-side. Brazil plug types vary depending on the region.

Knowing the power adapter’s plug type is essential when traveling since you must use a power adapter compatible with the outlets in the country you are visiting.

AC Pole for desktop power adapters

The term “power adapter” is also used to refer to the power supply that comes with an AC cable. This power adapter plugs into an AC outlet and provides power to the computer. Desktop power adapters typically have an output of 120 Watts, but there are also 200-Watt and 300-Watt adapters available.

The most common output is the 3-pin plug, which connects devices to the power supply. The 3-pin plug has three wires – the ground, live and neutral. Some desktop power adapters also have a 4-pin plug, which connects to devices that require more power, such as a graphics card. The 4-pin plug has four wires – the ground, live, neutral, and 12 V power supply.

The following are some examples of desktop power adapters and the desktop models they are compatible with:

  • C8 2 pins: Apple TV, Mac mini, and some MacBook models
  • C9 3 pins: Used by iMac G5 and early Intel-based iMacs
  • C14 3 flat pins: Used by MacBook Pro with Retina display 5.5mm x 2.1mm
  • C6 3 round pins: Used by MacBook AirHow to use a power adapter

DC connector

Laptop power adapters usually have a DC connector, which connects the adapter to the laptop. The DC connector has two parts – the inner part links to the notebook, and the outer part plugs into the AC outlet.

The inner part of the DC connector is typically barrel-shaped and has positive and negative signs. The outer part of the connector is usually cylindrical and has a pin that goes into the ground socket.

The most common DC connectors are 3.5mm, 4.0mm, and 5.5mm. Each size has a different diameter and is not compatible with connectors of other measures. The 3.5mm connector is typically used for small devices such as digital cameras, Audio devices. In contrast, the 4.0mm and 5.5mm connectors are used for laptops, and Universal Serial Bus (USB).

Some power adapters also have a USB port that can be used to charge devices that use a USB cable, such as a smartphone. USB ports are usually located on the side or back of the power adapter. The output of a USB port is typically 5 Volts and 1 Amp. Some power adapters have a higher output of 2.1 Amps, which is ideal for charging tablets.

Other power adapters have a DC port, which is located at the back of the power adapter and is used to supply power directly to the motherboard of a desktop computer. There are also Open End and unique ports like crocodile clips and Molex connectors, which aren’t very common.

Cable Length

The power adapter’s cable length also differs depending on the device used. For example, the power adapter for a laptop typically has a longer cable than the power adapter for a smartphone. They usually are 1.2m long; however, 1.5m to 3m are also available.

On the other hand, DC cables for desktop power supplies are usually much shorter since they only need to reach from the back of the computer to the power outlet. DC cables are typically 1m, 1.2m, 1.5m, and 1.8m in standard length.

Power Adapter Certificates

Power adapters must have specific certificates and safety approvals before selling them. The most common certificate is the CE mark, which indicates that the power adapter meets the safety requirements of the European Union (EU). Another standard certificate is the GS and TUV for Germany; cUL, FCC, ETL and Energy Star for North American countries; KC for Korea, PSE for Japan and RCM for Australia.

When purchasing a power adapter, ensure it has the appropriate certificate for your country. Otherwise, the power adapter might not work correctly or could be unsafe.

The connection between the Power Adapter and the device

A power supply connector connects the power adapter to the gadgets. It transforms the DC power to the device. Here are some typical power supply connection methods: Plug-in Connection, Terminal connection with screws, and Cable connection.

Plug-in Connection is for the power adapters with DC plug, USB port, and customized connectors. The terminal connection is for the devices that need some terminals for connection, like LED strips, CCTV systems, etc. We usually connect the devices with cable for LED products or the devices without ports.

How to choose the correct Power Adapter

Initially, you will have to identify what type of device you have and what connection it uses. Then determine the voltage and amperage the device requires, which are on the device or in the user manual. Once you know what type of connection and voltage/amperage the device requires, you can purchase a power adapter with those specifications.

Finally, ensure that your power adapter has the correct certificate for your country. Each power adapter will have different certification symbols depending on the country’s requirements.


Power adapters are handy but easy to ignore until they are needed. They provide power to electronic devices like laptops, smartphones, and tablets, which come in handy when traveling.

Power adapters can also supply power directly to the motherboard of a desktop computer. It can also charge batteries, which is especially useful for devices that do not have an AC adapter, like Bluetooth headphones or smartwatches.

When purchasing a power adapter, ensure that you get one with the correct voltage and amperage for your device and the proper certification symbols depending on your country. Knowing these things about power adapters can save you a lot of time and hassle in the future. Therefore, it is always best to get knowledge on these items you purchase so you can use them to their fullest potential! If need more help, feel free to contact us.

Constant Voltage and Constant Current Power Supply

There are many different types of power supplies available on the market. Today we would like to discuss the two main power supplies: constant voltage and constant current.

What is the difference between the constant voltage and constant current power supply? The biggest difference between them is whether the voltage or current is fixed.

What are the Constant Voltage and Constant Current Power Sources?

What is a Power Supply with Constant Voltage?

There is a power circuit called a constant-voltage power supply. This circuit keeps the output voltage at the same level all the time. Therefore, no matter how much current is used by the device, there will never be much change in voltage. Electric appliances will operate more efficiently with consistent power because they can’t work well if the voltage varies much. Therefore, manufacturers must pay careful attention to voltage, affecting their process.

What is a Power Supply with Constant Current?

Constant-current power supplies yet, maintain a fixed output current. That means the current will always keep the same whether the voltage varies. This power supply is always for LED lights with lighting functions.

Advantages of the Constant Voltage Power Adapter and Constant Current Power Supply

We know what they are and how they work now. Let’s discuss the advantages of them as follows.

Constant Voltage Power Adapter

Flexible: Due to the fixed voltage, the user can add as many LEDs as they like, up to the current limit of the LED driver. At the same time, this may result in a reduction in brightness.

Easily Accessible: The constant voltage power supply is more popular and widely used in the market, so it’s easier to get them.

Cost-effective: As many devices need constant voltage power adapters, there’re many manufacturers for them. Compared to other power supplies, a constant voltage power supply costs less.

Constant Current Power Supply

Provide a stable power source: The constant current power supply keeps the current stable, which could avoid burnout/thermal runaway from the significant current. Steady current is vital for precision instruments because they are susceptible to changes in electricity wind.

Control applications easily: The constant current power supply makes it easier for designers to control applications. Such as keeping a light in stable brightness.

Application of the two kinds of Power Supply

Different power supplies are applied for different devices. What are they applying for? Let’s figure out this.

Constant Voltage Power Adapter Application

A constant power supply gets the power voltage (120-277VAC) from a wall outlet at home. It can convert the AC(Alternative Current) power to the lower DC(Direct Current) power, which keeps the devices working well. The constant voltage is helpful for many applications, like LED strip lights, home and office appliances, industrial equipment, etc.

If the LED strip requires 12VDC, there is no need to question whether you want a constant current driver. This source has an onboard circuit that controls the current to be steady. So, all your need is a 12VDC constant voltage source.

Constant Current Power Supply Application

The constant current power supply operates in a variety of applications.
If the current fluctuates, the LED lighting brightness will also change.
This isn’t a big deal for small screens, but if you have many lights, the brightness shift is noticeable, so you need a steady current. Thus the constant current LED driver will be helpful for the LED lights which need stable brightness.

Moreover, the voltage and current at charge are not proportional. This is due to the nature of rechargeable batteries. As a result, a constant current power supply is valuable. It ensures the battery gets the same present amount, regardless of the voltage.

How to Clarify if we need a Constant Voltage Power Adapter or a Constant Current Power Supply?

A constant voltage adapter can be less expensive and simpler to build for applications that use bright or contrasting colors, such as signs, LED tapes/LED strip lights, and other similar uses. However, a constant current power supply might be preferable when the final application is lighting. More precise regulation of light quality and intensity is made possible, and it is possible to fine-tune LED systems to keep them running as efficiently as possible.

The application of a constant voltage adapter is wider than the constant current power supply, such as LED strip lights, LED screens, LED signs, home and office appliances, business equipment, industrial devices, telecommunication equipment, etc. While the constant current power supply is applied for LED lights for brightness use, rechargeable batteries charging, and precision instruments.


The Constant Voltage Power Adapter and Constant Current Power Supply are available in the market. They are both available for LED products. To figure out if we need a constant voltage power adapter or constant current power supply, it depends on what usage we need the LED products for. If for brightness or color-changing, the constant voltage power adapter is better; if for lighting, the constant current power supply is preferable. If there are any questions, we’re here to help.

LED Power Supply

Everything requires energy and power, whether in the form of magnetism, chemistry, or electricity. It’s not any different for LED setups. LEDs can’t be powered by the standard alternating current (AC) found in traditional wall outlets; instead, they require direct current (DC). Therefore, an LED power supply must convert the AC power to the DC power that the LED system needs.

Different kinds of LED power supplies

LEDs have two different power types: 1. A power source with a constant voltage, also called a lighting transformer. 2. A constant LED driver with constant current output.

1. Constant voltage power supply/LED lighting transformer

Constant voltage LED power supplies are sometimes known as lighting transformers. This implies that the output voltage is stable. It works great with the LED system, which has current-limiting resistors. Such as LED tapes, LED billboards, LED displays, and so on. DC 5V, DC 12V, and DC24V are three standard output voltages for LED power adapters.

2. LED driver with constant current

A constant current LED driver maintains a fixed output current regardless of changes in input voltage. That means the LED driver will supply a constant current to the LED lights, guaranteeing their consistent operation. It can power the LED systems without a current limiting device (like a resistor).

LED power supply vs. LED driver

The voltage or current regulation is the main difference between the LED power adapter and the constant current LED driver. The LED power adaptor regulates the voltage, while the LED driver regulates the current.

The type of LED makes a difference in terms of practicality. We need a constant current supply if we need to limit the current flowing through a LED. A constant voltage power supply is also workable if there’s a current limiting resistor.

Some LED lights and tapes have built-in current limiters, which can be powered by any constant power adapters with enough current.

How to choose the right LED power supply?

Now that we’ve covered the types of LED power supplies. Let’s talk about how to pick the best one. Below are some tips:


Get the wattage of the led light first. If we want to power multiple LED lights with one power supply, we need to add up the wattage of all the LED lights.

Furthermore, remember the following: Use 80% of the power supply wattage. So, please apply the following formula: LED system wattage / 0.8 = LED power supply wattage. For example, the total LED system power is 100W, and the wattage of the LED power supply is 100W / 0.8= 125W. So we need a power supply with 125W or higher wattage.


Inspecting the LED system’s input voltage is critical since this will determine the power supply’s output voltage. Contact us if you need more information, or feel free to contact the company that made the LED system to find out more.

PFC(Power Factor Correction) or not

Utility power/mains supply benefits from power factor correction (PFC). As a result, the power supply costs will rise. A PFC is required in the LED business if the power supply exceeds 25W in wattage.


Safety Certificate

Certificates of compliance with local safety regulations may also be necessary. Use a power supply that complies with local safety regulations. Not all LED power supplies are on the UL list for the US market. Prowin’s power adapters have passed the tests that UL requires for the LED industry.

Dimmable or not

Determine if the LED system needs dimming capabilities or to be adjusted for brightness. If that’s the case, double-check that your LED’s power source supports dimming. Specify whether a power source is dimmable and what kind of dimming control it uses. There are typically 5 different types of dimming controls: TRIAC dimming, 0-10 volt dimming, resistive dimming, 1-10 volt dimming, and pulse-width modulation dimming.

Application environment

Confirm the optimal location for the LED lighting system’s installation. It will be safe to install the power supply with the proper casing. The IP level indicates whether the power supply unit is dust-proof and waterproof. The power supply rated IP20 is often for indoor use, while those rated IP65 or IP67 are typically for outdoor LED systems.


The power supply for an LED system is a vital part of the whole. It verifies the proper operation of the LED lighting system. It’s not always clear if we require a constant voltage power adaptor or a constant current LED driver. Differences between the two will aid in our search for a solution. We need the correct power supply for our LED systems, and the above-mentioned six elements are crucial. When working with electronics, they must be risk-free and reliable. Contact our staff at +8615013765242 if you need help deciding which power supply to employ for your LED project.