Brand | Wefomey |
---|---|
Manufacturer | Wefomey |
Place of Business | CN,523681, Guangdong, Dongguan, Fenggang Village, Jin Xiao Tang Huan Cun Road 102, Room102 |
Part Number | 9V-36V4A |
Compatible Devices | 交直流转换器 |
Special features | 短路保护 |
Mounting Hardware | Connectors |
Number of Items | 1 |
Output Wattage | 144 Watts |
Wattage | 144 watts |
Power source type | Corded Electric |
Batteries Required | No |
Number of Ports | 14 |
Total USB Ports | 2 |
Connector Type | Proprietary DC |
Mounting type | Wall Mount |
Does it contain liquid? | No |
Manufacturer | Wefomey |
Manufacturer reference | 9V-36V4A |
Parcel Dimensions | 20.1 x 9.1 x 7.1 cm; 540 g |
ASIN | B0C5HZ5YT4 |
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Wefomey Universal Power Adapter Adjustable DC 9V ~ 36V Variable Switching AC Supply Adapter 100V-240V to DC 36V 4A 144W Converter with 14 Different Plugs & Polarity Converter - 4000mA Max
Purchase options and add-ons
Brand | Wefomey |
Connectivity technology | Proprietary DC |
Connector type | Micro USB |
Compatible devices | 交直流转换器 |
Included components | Connectors |
Special feature | 短路保护 |
Colour | Black |
Input voltage | 240 Volts |
Mounting type | Wall Mount |
Amperage | 4 Amps |
About this item
- 【Variable Power Supply】Input: AC 100~240V, 50/60Hz ; Output: DC 9~36V Adjustable, Max 4A 144W ; It can supply with any voltage between 9~36V, such as 9V 12V 14V 15V 16V 18V 19V 20V 22V 24V 25V 26V 28V 30V 32V 36V, etc and any amp less than 4A, such as such as 300mA, 500mA,1A, 1.5A, 2A, 2.5A, 3A,3.5A, 4A. LED display will show the output voltage, if the current drawn exceeds 4A, the power supply will be damaged soon. Never overload!
- 【Upgraded Version Power Supply】1.The knob can be adjusted more evenly, and it can reach 22V~24V by rotating 50%. 2. Increase the off gear to turn off the power without pulling the plug. 3. Add a polarity converter cable, which make it compatible with more devices, doubles its range of application. 4. Built-in multiple safety protection systems. Automatic overcurrent, overvoltage ,overload, short-circuit protecty. No noise, no spontaneous combustion, no explosion, no fire hazard, safe to use.
- 【Multiple DC Tips】It comes with an original 5.5x2.5mm tip and 14pcs frequently used tips: 6.5x4.4mm+Pin, 5.5x2.1mm, 5.5x3.0mm+Pin, 5.0x2.5mm, 6.3x3.0mm, 5.5x1.7mm, 4.8x1.7mm, 4.0x1.7mm, 3.5x1.35mm, 3.0x1.1mm, 2.5x0.7mm, Micro-USB, Type-C and DC terminal connector. Can be applied to almost all commonly used electronic devices. You can screw wires onto it easily, perfect for DIY projects. 6ft long power cable makes it convenient to use.
- 【Universal Power Adapter】The 144W all-in-one multipurpose AC/DC adapter fit for many 9~36V small household electronics such as portable bluetooth, wireless receivers, electrical toys, classic radio, games consoles, GPS, DVR, massage gun, webcam, CCTV camera, speaker, lan phones, external speaker, 12V 24V LED strips Lights, 36V electric scooter, electric bike and more. For indoor use only. (Check dc jack before buy: 5.5x2.5mm, compatible 5.5x2.1mm)
- 【Worry-Free Shopping】Package includes 1 x 9~36V 144W multi voltage universal ac/dc adapter, 14 x DC tips, 1 x reverse polarity converter. We focus on producing premium quality and safety power adapters. If there is any issue, please feel free to contact us. We have 30 days money back guarantee, 24 months exchange.
- *This product is an AC to DC adapter, NOT charger!!! It can’t be used to charge electronic devices with batteries, such as laptops. Please choose correct voltage before plug it to your device. Wrong voltage may damage your device. We recommend to use less than 80% of the full load.
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Product information
Technical Details
Additional Information
Date First Available | Aug. 15 2023 |
---|---|
Customer Reviews |
4.1 out of 5 stars |
Best Sellers Rank | #5,598 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #72 in International Power Adapters |
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Wefomey Universal Power Adapter Adjustable DC 9V ~ 36V Variable Switching AC Supply Adapter 100V-240V to DC 36V 4A 144W Converter with 14 Different Plugs & Polarity Converter - 4000mA Max
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Price | $36.99$36.99 | $18.99$18.99 | $36.79$36.79 | $24.99$24.99 | -25% $21.00$21.00 List: $27.90 | $39.99$39.99 |
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Sold by | Wefomey-CA | Arkare-US | SHNITPWR-CA | Basicvolt-CA | bailuzhou | Wefomey-CA |
connector type | Micro USB | Barrel Connector | Micro USB | Barrel connector | Micro USB | Micro USB |
number of USB ports | 2 | 0 | 1 | 1 | 1 | 0 |
compatible devices | — | Laptops | Laptops | Monitors | smartphones, Router | GPS, CCTV camera system, HDMI Converter, LED strip light, DVD Player, DVR, Bluetooth Speaker, mobile phones, Kindle, camera, router, tablet, radios, electronic gizmos, exercise equipment, games consoles |
input voltage | 240 volts | 110 volts of alternating current | 220 volts of alternating current | 12.0 volts, 240.0 volts | 120 volts of alternating current | 240 volts of alternating current |
connector gender | Male-to-Male | Male-to-Male | Male-to-Male | Male-to-Male | Male-to-Male | Male-to-Male |
power source | Corded Electric | AC110V | Corded Electric | AC Adapter | Corded Electric | Corded Electric |
specification met | FCC, RoHS, CE | FCC, CE, RoHS | CCC | UL | UL | FCC |
output voltage | 36 volts | 5 volts of direct current | 9 volts | 12 volts of direct current | 12 volts of direct current | 36 volts of direct current |
frequency range | 50-60 Hz | — | 50-60 Hz | 60 hertz | 60 hertz | 50/60 Hz |
current rating | 5 amps | 2 amps | 4 amps | 2 amps | 1 amps | 4 amps |
Product Description

This is a universal power adapter fits almost all DC input sockets. Wide Applications for GPS, CCTV camera system, HDMI Converter, LED strip light , DVD Player, DVR, Bluetooth Speaker, mobile, Kindle, camera, router, tablet, radios, electronic gizmos, replacing charger cords, rowing machine, games consoles and many other household electronics.
Parameter
Input: AC 100V~240V 50/60Hz
Output Voltage: DC 9V~36V Adjustable
Output Current: Max 4A
Output Wattage: Max 144W
Output DC connector: 5.5mm x 2.5mm (inside"+", outside"-") 14 Tips Size: 6.5x4.4mm+Pin, 5.5x2.1mm, 5.5x3.0mm+Pin, 5.0x2.5mm, 6.3x3.0mm, 5.5x1.7mm, 4.8x1.7mm, 4.0x1.7mm, 3.5x1.35mm, 3.0x1.1mm, 2.5x0.7mm, Micro-USB, Type-C and DC terminal connector.
Reverse polarity converter: 5.5mm x 2.1mm
Power cable length: 6.56ft / 200cm
Working Temperature: -20~50℃
Ambient Humidity: 5~95% Non-Condensation
Weight: 1.18 lb / 535g

Package included
1x 144W Universal Power Supply Adapter; 14x DC Tips; 1x Reverse Polarity Converter Cable
Attention: The power cord between power brick and DC plug will lead to 0.4V~0.6V voltage drop, so we designed the screen displayed voltage was 9.5V~36.5V. Only in this way can your device really get 9V~36V voltage. This is the reason why we advertise the power supply's voltage range is 9V~36V, not 9.5V~36.5V.
Caution: The 17.cm short black power cord is a reverse polarity converter, not extension wire. It is used to reverse the original polarity of the power supply output port ( reverse the internal positive pole to negative, and the external negative pole to positive). Please confirm the polarity of your devices’ power port before use. If the positive and negative poles are reversed, it will cause short circuit and damage your device.
Instructions on how to choose a suitable adapter:
1. Check Voltage Please find the spec label of your device and check the working voltage. It should be among 9V~36V DC, not lower than 9V or higher than 36V DC. Otherwise, your device will not work or be damaged.
2. Check Current Check the max current your device will draw. It should be equal to or less than 4A, such as 500mA, 1A, 2A, 3A, 4A. Otherwise, your device won’t work well and the PS will be damaged very soon.
3. Check Plugs Check the power input port of your device. The PS is equipped with 14 pcs frequently-used DC tips. Please confirm wether it fits for your device before buy. If you can 't confirm, please measure it with a ruler.
4. Check Original PS If you have a original power supply for reference, their output voltage, plug size, polarity should be the same. If our PS’s current is equal to or higher than original one’s, then our PS will work with your device.
Customer reviews
Customers say
Customers find the charging adapter useful for various devices and appliances. It comes with a variety of adapters to connect to different applications. Many consider it handy and good value for money. However, some customers have issues with the quality and display brightness. There are mixed opinions on the voltage range and brightness.
AI-generated from the text of customer reviews
Customers like the charging adapter's functionality. They say it works great with a manual dial and small LED voltage display. It works at 12.4V and 6.4A, and is useful for testing hardwire kits.
"...I usually use 6V to 12V range, works great no issues. Just make sure you dial the right voltage BEFORE plugging it into your device." Read more
"...Other than these discrepancies, the device works well...." Read more
"Works as it should. Nice plug adaptors set." Read more
"It works fine and the tips work well,..." Read more
Customers appreciate the adapter size. It comes with a variety of adapters for different applications and common connectors, making it compatible with almost any device. The adapters cover 3V to 24V and an assortment of plugs to fit any jack imaginable, including ones with reverse connections. They find it easy to use, compatible with multiple devices, and universal AC adapter sockets.
"...The ability to dial up and down the voltage allows you to test a wide range of electronics. I usually use 6V to 12V range, works great no issues...." Read more
"This power supply (PS) has all the adaptor to connect to almost all devices...." Read more
"Works as it should. Nice plug adaptors set." Read more
"...Great price, easy to use, compatible with multiple devices. A must have for anyone who has plenty of devices." Read more
Customers find this charging adapter useful. They say it's handy for most appliances and devices, and good to have around the house. The reverse polarity makes it useful for all their devices. However, some customers find adjustments difficult, making it suitable for non-precision use.
"...Super useful, exactly what I needed, very happy with it." Read more
"Handy to have on hand as everything today seems to need an exterior power brick to work.......The benefit of the variable power supply is simple and..." Read more
"Works great - good to have around the house...." Read more
"This adapter is extremely useful for me. Presently it is powering a tiny Nobsound amp that did not come with an adapter...." Read more
Customers appreciate the charging adapter's value for money. They say it provides good quality for the price.
"Love this charger. It works for pretty much everything. Great price, easy to use, compatible with multiple devices...." Read more
"...Great value." Read more
"...Definitely worth the money." Read more
"...Very good value for money." Read more
Customers have different views on the voltage range of the charging adapter. Some find it has adequate power and a variable voltage, with an adjustable knob that allows them to test a wide range of electronics. However, others report issues with the power supply not maintaining the set voltage or randomly spiked to 30 volts. The knob adjusts the power level easily, jumping between 1 and 3 volts.
"...The ability to dial up and down the voltage allows you to test a wide range of electronics. I usually use 6V to 12V range, works great no issues...." Read more
"...PS needed 19V to run, I set this PS to 19v and it was unable to maintain the set voltage, even if I set the PS at 19.5 it still dipped below 19V and..." Read more
"...Adjustment is easy via the rheostat and the digital indicator. Plenty of wire length to have the PS close or far...." Read more
"...with electronics that you give this a miss, the voltage control is difficult to actually set to the exact level you need and this could very easily..." Read more
Customers have different views on the brightness of the charging adapter's LED display. Some find it bright enough to see through one layer of black, and appreciate the nice voltage display with a dial. Others feel the display is too bright when used, which is a negative.
"Great product nice to be able to see the volts and set it with multiple connections however should comme with instructions as it blinks when your..." Read more
"...My only complaint is that the LED display is really bright, a negative when being used in a setup in a dark room to help put the baby to sleep...." Read more
"...Works great. Manual dial, small LED voltage display...." Read more
"...When you plug it into the wall, you get a nice display of the voltage and a dial with which you can adjust it...." Read more
Customers are unhappy with the charging adapter's quality. They say it's low-quality, flimsy, and defective.
"...The actual adapter is rather light and flimsy. Guess there's no much electronics involved in such an adapter." Read more
"Worked as expected. Not the best quality but acceptable." Read more
"...This made the camera "pop" and never turn on again. Disappointing and unsafe." Read more
"I do not work properly. Low quality product." Read more
Customers are unhappy with the charging adapter's display brightness. They mention it flashes before turning it on and blinks when overcharging.
"...however should comme with instructions as it blinks when your putting in to much I didn't realize that at first" Read more
"...The display flashed before I even turned it on so never saw a voltage level. Should I try another one? They seem to be popular...." Read more
"...that fits your desired device, plug it in and... The voltage display flashes, and the device does not power on...." Read more
Reviews with images

Fine adjustments are difficult, good for non-precision use
Top reviews from Canada
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- Reviewed in Canada on February 8, 2025Style: 3V-24V3AVerified PurchaseI put a lot of electronics from yard and estate sales. We can't always test items because of missing power cords and AC adapters. This universal AC Adapter is a game changer for me. The plugs that it comes with means you can virtually fit any AC adapter socket. The ability to dial up and down the voltage allows you to test a wide range of electronics. I usually use 6V to 12V range, works great no issues. Just make sure you dial the right voltage BEFORE plugging it into your device.
- Reviewed in Canada on January 17, 2025Style: 3V-24V3AVerified PurchaseThis power supply (PS) has all the adaptor to connect to almost all devices. In my case, I'm using it for a small lathe where , now, I can vary the speed of the motor. Adjustment is easy via the rheostat and the digital indicator. Plenty of wire length to have the PS close or far. Happy with this purchase, recommended.
- Reviewed in Canada on February 19, 2024Style: 3V-24V5AVerified PurchasePurchased the 120W (24V 5A) version for $32.98 CAD (including $3 coupon) in February 2024.
First off, the brand is not the same as the listing. Instead of Wefomey, it is HOUHUI. Does it matter? Maybe, who really knows.
Secondly, the description lists a 3-24V adjustable range, however on the device it shows 4-24V instead. When the voltage is dialed to its lowest setting, it reads 3.20V.
Other than these discrepancies, the device works well.
To clarify some of the adapters and sizes, the permanent plug (male) is 5.5x2.5mm, and due its design allows for both 5.5x2.5 and 5.5x2.1 jacks (female) to be connected. All of the other adapters' jack (female) ends are 5.5x2.1mm.
When using at less than 10V, it will display 2 decimal points (eg. 4.45 or 8.97V). Once above 10V, it will only show 1 decimal point (eg. 12.3 or 19.9V).
When using a multimeter to test for its accuracy, when below 10V, the measured voltage can vary as much as 0.1V from what is displayed. When measuring above 10V, the measured voltage reads as much as 0.2V higher. It is possible to slightly move the adjuster dial without causing the voltage display to change, but the actual measured voltage will change.
Currently using it to charge a battery that has a low cutoff voltage of 11.9V. The original charger it came with is a fixed 12V 5A charger, but the voltage drop when connected causes it to go below 11.9V and stop charging the battery. With this device, I can set a voltage slightly above 12V so that it accounts for voltage drop, and stays above 12V when charging the battery.
4.0 out of 5 starsPurchased the 120W (24V 5A) version for $32.98 CAD (including $3 coupon) in February 2024.Fine adjustments are difficult, good for non-precision use
Reviewed in Canada on February 19, 2024
First off, the brand is not the same as the listing. Instead of Wefomey, it is HOUHUI. Does it matter? Maybe, who really knows.
Secondly, the description lists a 3-24V adjustable range, however on the device it shows 4-24V instead. When the voltage is dialed to its lowest setting, it reads 3.20V.
Other than these discrepancies, the device works well.
To clarify some of the adapters and sizes, the permanent plug (male) is 5.5x2.5mm, and due its design allows for both 5.5x2.5 and 5.5x2.1 jacks (female) to be connected. All of the other adapters' jack (female) ends are 5.5x2.1mm.
When using at less than 10V, it will display 2 decimal points (eg. 4.45 or 8.97V). Once above 10V, it will only show 1 decimal point (eg. 12.3 or 19.9V).
When using a multimeter to test for its accuracy, when below 10V, the measured voltage can vary as much as 0.1V from what is displayed. When measuring above 10V, the measured voltage reads as much as 0.2V higher. It is possible to slightly move the adjuster dial without causing the voltage display to change, but the actual measured voltage will change.
Currently using it to charge a battery that has a low cutoff voltage of 11.9V. The original charger it came with is a fixed 12V 5A charger, but the voltage drop when connected causes it to go below 11.9V and stop charging the battery. With this device, I can set a voltage slightly above 12V so that it accounts for voltage drop, and stays above 12V when charging the battery.
Images in this review
- Reviewed in Canada on February 9, 2025Style: 3V-24V3AVerified PurchaseWorks as it should. Nice plug adaptors set.
- Reviewed in Canada on October 24, 2024Style: 3V-24V5AVerified PurchaseMy Asus laptops original PS needed 19V to run, I set this PS to 19v and it was unable to maintain the set voltage, even if I set the PS at 19.5 it still dipped below 19V and the computer shut down.
- Reviewed in Canada on November 14, 2024Style: 3V-24V3AVerified PurchaseIt works fine and the tips work well,
but i would highly recommend that if your not experienced with electronics that you give this a miss, the voltage control is difficult to actually set to the exact level you need and this could very easily lead to something being damaged beyond repair
- Reviewed in Canada on February 4, 2025Style: 3V-24V3AVerified PurchaseI use this to control a diaphragm pump, the adjustability essentially works like a 'dimmer' allowing me to control the speed of the pump. Super useful, exactly what I needed, very happy with it.
- Reviewed in Canada on February 2, 2025Style: 3V-24V5AVerified PurchaseHandy to have on hand as everything today seems to need an exterior power brick to work.......The benefit of the variable power supply is simple and will cover most of your power supply needs. While there are some power supplies that operate outside the 4V to 24V range, just make sure to follow and stay with in the intended power supply specs that your are substituting for.
It won't replace every supply in your house, but it's a great emergency back up for most....
Recommended
Top reviews from other countries
- Lonster MonsterReviewed in the United States on December 19, 2024
5.0 out of 5 stars Works well and very precise!
Style: 72WVerified PurchaseThis is a really good, well made power supply. You can dial in the exact voltage you need. It has a nice readable display that is plenty bright. Great product.
- Shadowolf44Reviewed in the United States on January 31, 2025
4.0 out of 5 stars Solid adjustable voltage adapter
Style: 72WVerified PurchaseCharger worked great! Adjustability of voltage is great but fine tuning the voltage was a little tricky. If this had two knobs , one for large adjustments and the other knob for fine tune this thing would be super awesome! Otherwise, voltage displayed is only off by .2 but that works for me. Better to be under than over by and risk destroying the connected item. The only other thing with the multitude of connectors. No handy bag or case to store it in. I can definitely see myself misplacing it in the future.
- AZEnergizerReviewed in the United States on November 8, 2024
5.0 out of 5 stars Good Power Supply.
Style: 72WVerified PurchaseWorks good but use with caution. You could easily and instantly damage expensive electronics because voltage is variable and it's easy to accidentally change with a light touch of the control knob. I recommend using a meter to confirm the voltage before plugging anything in and then carefully put the control in a place where it will not fall or be disturbed.