Charger Doctor USB Power Measurement Demo

This small device allows you to easily measure power consumption, check your charger, for your USB powered devices such as smartphones, mini PCs, tablets, and more.

[DimitriRoegiers]

I bought 3 of these recently. Only a few €, it's amazing. Measurments aren't very precise, I put them 3 in serie and they all gave a different reading. I would say +- 5mA and 0.1V. But great for testing different chargers. Surprisingly, the cheaper chargers from eBay gave the best results...