Review on 🔌 Vipe USB Charger Power Detector: Battery Tester with Voltage & Current Meter by Robert Larris

I bought this as a novelty and as a tool to get a rough reading of the voltage readings on the USB ports on my laptop. My impression is positive. It is exactly as the ad shows. He arrived on time. I connected it to my laptop's USB2 port and it immediately showed the values of V and A. The 7-segment LEDs are sufficient for home use. With nothing plugged into its "OUT" (passive) ports, it shows that my laptop's USB port is 5.07V + -0.01V with about 2Hz updates; and it constantly shows 0.00A (expected because I didn't connect anything to its OUT ports). I left it passive for 12 days with no problems. I have NOT tested the V or A accuracy yet because I don't have a meter, but it looks like it's working. (Windows 7). I'm glad to have it in my tool box.