Power supplies are tested under load in a working system. You tube has helpful videos . You will only receive what you see.
eBay
The products are widely used in cell phone repair, computer repair, battery charging, school teaching and production line use. This machine has USB fast charging function and supports many kinds of fast charging protocols.
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1PCS New Original Power Supply Board Connector For JBL Link 20 Bluetooth Speaker Micro Port Charging Board
AliExpress
I was relieved to know that Synology-compatible power supplies were being sold. I plugged it in and sang your praises. - 320W (110v-230V). - Mother Board Connector Form Factor.
eBay
DC022B 5.5 x 2.1mm DC Power Jack Supply Socket Connector DC Female 2 Terminal 2 Pin Panel Mount Connector Plug Adapter 5.5*2.5
AliExpress
Part Number: 5P51D77172. Model: 5P51D77172. 24/7 Support. until 12pm central.
eBay
AC 85-265V to DC 5V 12V 24V step down Transformer power supply 1A 2A 4A 6A 8A 9A 13A switching power module bare board
AliExpress
Large quantity available. Price is for each unit. High 5v current perfect for your retro gaming PC build.
eBay
ALLPOWERS Portable Generator 288Wh / 78000mAh PowerStation Emergency Power Supply with DC / AC Inverter, Wireless Output Camping
AliExpress
Featuring a 120mm cooling fan, the Toughpower GX2 delievers excellent airflow at an exceptionally low noise level. ATX Connector: ATX 12V 4+4pin connector (600mm) x 1. Form Factor: ATX. High Amperage Single +12V Rail.
eBay
DC-DC 120W / 150W / 250W / 9A 300W / 300W 20A / 400W 15A / 600W 10A Step Up Boost Converter / Step Down Buck Power Supply Module
AliExpress
PCIE5 Plus Gold. SeaSonic Electronics VERTEX GX-1200 Overview.
eBay
Manual, cables, cord or any other accessories not pictured. This product is not covered by manufacturer warranty and therefore does not get manufacturer service assistance. Tested-Good working order.
eBay
Evemodel 2 Units Double-Layer Power Distribution Board 2 Inputs 2 X 13 Outputs for DC AC Voltage PCB007
AliExpress
2 x Dual 4-pin IDE power connectors. 2 x Dual 4-pin IDE & single floppy power connectors. Good working condition. 2 x triple SATA connectors. 4 x 6-pin PCI-E connectors.
eBay
DC-DC 3A Buck Step-down Power Supply Module MP1584EN 5V-12V 24V to 5V 3.3V 9V 12V Fixed Output for Arduino Replace LM2596
AliExpress
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Converter 12V Step Down To 3V 3A 15W Power Supply Module DC/DC New L15
AliExpress
Output Power 450 Watt. MTBF 100,000 Hours on Maximum Load at +25°C. Current 36A 0.5A 22A 0.5A. Place your order Now! SpecialO ffer!
eBay
Model Number : D14-280P1A, D13-280P1A, PCE015. 【Input & Output & Interface】 Input: 100-240V~ 50-60Hz; Output: +12Vmain=--16.0A. MAX OUTPUT：280w. Compatible Model: ForHP ProDesk 600 680 800 880 and G2.
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LM2596HV AC/DC to DC Buck Step Down Converter Power Supply Module LM2596 3v 3.3V 5V 6V 9V 12V 15V 24V AC 5V-30V, DC 5V-50V
AliExpress
Used, tested and working. Removed from Apple Mac Pro A1289 2010.
eBay
Boost Buck Converter USB Step UP / Down Power Supply Module DC-DC 5V to 3.3V / 12V Adjustable Out DC 1.2V-24V
AliExpress
Application area. Laboratory and scientific research teaching. Shenzhen Guce Electronic Technology Co., Ltd. was established in 2017. Production line testing. Constant pressure CV. output current. Load stability: 0.5% ± 3mV.
eBay
1090MHz 1.09GHz ADS-B Active SAW Filter &LNA 5V Power Supply
AliExpress
With 3 sets of data storage, it is convenient for quick recall. This device has USB fast charging function and supports multiple fast charging protocols. Output current 0~5A. Laboratory, scientific research and teaching.
eBay
ARGB PSU Power Supply Extension Cable 24 Pin Motherboard Extension Cable graphics card 8-Pin 6+2Pin RGB glow extension cable
AliExpress
The auxiliary function includes USB-A/Type-C fast charging function. USB-A/Type-C fast charging function, supporting multiple fast charging protocols. Laboratory, scientific research, and teaching.
eBay