HiLetgo LCD USB Current Voltage Doctor Charger Capacity Tester Meter Power Bank: Optimize Your Device Charging Experience Review

Product works, but try plugging into a USB port that is horizontally next to another USB port. Connection to a PC or laptop. It's so FAT that you have to unplug anything plugged into the adjacent USB port.

This tester works well but its ergonomics are not the best. The display is very small and not very bright. Also the USB connector (A) is reversed for my fixed mount application. It seems accurate and stable. Spend more, get more.

device works great. I can't verify the accuracy, but after charging multiple batteries, the meter shows the expected amount of mAh. I like the clear backlit display. I left it on for a couple of days and it had no issues with heat (even at 2A DC) or screen burn-in. money well spent.

Product works as intended I found my phone was draining quickly. The amperage the charger was giving my phone was not enough to keep my phone charged. The downside was that it was scratched when I took it out of the box, but not enough to bother me when looking at the display. The product serves its purpose and I can only recommend it.

This little USB tester is crazy value. I use it to test backup batteries and small USB solar arrays. It has already paid for itself as I proved that the battery was not of the advertised capacity and got a refund from the seller. This particular battery was sold at 20,000mAh, but it was actually 8,000 and at 5V only about 5,600mAh could be used.