DROK USB Load Tester, Electronic Load Test Resistor Module 25W LD25 USB and Type C Interface Discharge Adjustable Constant Current 0.25A-4A Intelligent Temperature Control with Cooling Fan

I was very pleased. Because of the ability to set the load, I was able to identify some USB cables that could not support very much current. This explains why there were some charging issues. I decided to use it to test another batch of five cables that were still packaged. Three of the five were open, no connectivity through the cable.It also helped identify a cable whose temperature rose 4 degrees in five minutes with a 2 ampere load. That cable contributed to charging issues.The current indication is also very accurate when measured with a USB Multimeter..I would recommend this. It is good controllable load. It has met all of me expectations.The photo shows it as the load for a cable being tested. The cable is held on a flat surface so that an infrared thermometer can measure the temperature at 30 second intervals.

Works well. I was able to test USB-C chargers up to 20 V and a little more than one amp. If you exceed the 25 W rating, the display reads OOP and it shuts off.

Used this as a discharge device for devices that need to ship at a certain charge level and it works great. Love that the load is adjustable

This is a decent little variable load for testing USB devices, and if you cut the USB cable, you can use the power wires to attach non-USB loads as well. And since the device offers over-voltage, over-current and over-power protection, it would be hard to kill it.I like that it offers three types of USB connectors, which increase its versatility.Very easy to use and set and offers a fully variable load, so you can sneak up on the limits of your power source and know when it craps out.Very small footprint so it doesn't take up a lot of room on your workbench or in your toolbox.In my testing, it was able to handle the advertised loads (different for each connector type) plus a little more.Disappointing if you want to use to test small solar panels outdoors however, since the display is impossible to read under bright lighting conditions. The display has a slow refresh rate too, so taking a photo of the readout is unlikely if not impossible. (see my review photos for an illustration of what I mean)

These work as you would expect. I bought one to try and was impressed. I bought several more so I can put heavier loads on USB chargers with multiple ports.

DROF load module with fan. 5 stars with one caveat! Works great. Only issue is the PCB standoffs. No room on PCB to add nuts and use longer threaded standoffs.This is a preliminary review. DROK works at multiple voltages up to 4amps. Some reviews say there is no way to select 5v, 12v, etc. NOTE the voltage is set by the USB CABLE automatically. There are 2A, 3A, etc.; 18W, 65W, 100W, and at the moment the highest 240W. These are SMART cables and have control logic in the connector housing that sets the power to 5, 12, or other PD voltage. A basic dumb USB cable will be only 2AMPS. A cable that is MARKED 65W, 100W, or 240W, or "3.1 Amps" is required to get those power levels.I tested this DROK load unit drawing 3.7 amps at 5 volts at which point my tester shuts down. Which is normal. For newer larger batteries I used the DROK load tester with a short USB Y cable and a second resistor bank load that comes with the tester (tester had fan and heatsink). The resistor bank can be set to 1,2 or 3AMPS. If you want more load, that is how to get it. Used the DROK to add 3.5 more AMPS with fine tune adjustment. Note the fan only comes on when the unit gets hot at about 2 amps.More later...

The media could not be loaded. I like the fact that you can set the load current precisely. The load will automatically cool itself. I am using this to see how much capacity battery banks have, for real. Amazing tool.

Perfect for testing power supplies