Vastarry 180W DC Electronic Load Tester, USB Load Tester, Lithium Battery Capacity Tester, Color Screen Data Monitoring, Constant Current and Constant Voltage, etc. 4 Working Modes

Works like a champ.

I've used this load to check old VRLA UPS batteries and USB 12W power adapters, so far. I had 6, 9AH VRLA batteries, from 2 UPS units. It was nice to know that the old batteries had <20% of their rated capacity left. Only one of the USB adapters, met the 12W spec. These tests were simple to perform with this electronic load. I like that it powered up with a QR code to help you get the manual. I don't like that I see it each time I power it up. I tool away 1 star because it isn't that user friendly. I would like to be able to reset the data without going into setup and scrolling. I also don't like the fact that the fan seems to stop running as soon as you turn off the load. I've been dialing down the current or constant power setting, before turning off the load, to cool things down a bit.

Wow you can really do a lot with this. I use it to capacity test my RC batteries. You can even use it to destroy old worn-out ones. Just set it to 1.5a to 2a discharge to .7v, throw the battery in a fireproof bag and let it go. I also use it to stress test my USBC adapters to make sure they put out the power they are rated for. Also, if you watch a few YouTube videos it's possible to modify it to handle 450W and it's a pretty simple operation. It's easy to operate, functions very well, the screen is nice but some of the information is hard to read as the font is really small or dark in color.

I got this DL24-180 Watt load to replace a similar 150 Watt load which intermittently stopped seeing the input voltage when using a USB C cable. My use is mainly for testing capacities of power banks, but it can be used for testing a much wider range of power source devices. Low and behold after using the new electronic load a few times, just like the old one, it started not detecting the input voltage intermittently. There seemed to be no pattern to this and it happened with 6 different USB C cables that I have. After more experimenting I believe that I located the issue. It seems that the input voltage is not detected only when I plug the USB C cable into the small adapter board connected to the 4 terminal strip a certain way. If I flip the connector the voltage is detected. USC C is supposed to work regardless of the way the connector is plugged in. Currently I have no way to see if the USB C connector is mounted on the small board using both sets of contacts or only 1 set, or if the connection opened after repeated USB C cable insertions. Wiggling the connector does not show any change I went back to the older 150 Watt load and I found the same situation. In my eyes this is a major flaw, hence the 1 star rating.

I like this unit. However, I see it as "ma" not an amp load tester for car or E-bike batteries. The max load I see it putting on a car battery is about 13-amps, and that will not assure it will start your car. For those of you struggling with the User Guide, I have attached my rewrite of the User Guide for this unit in the photo below. I think this might help you.