Review on 💻 10 Pack USB 2.0 A Female to USB Micro Female Adapter Converter - Premium Quality Couplers by Tim Roby

That gives me a good idea of the performance of the USB chargers and cables that are stacked here. The charging capability depends on the voltage, voltage stability and current supplied. I use these adapters to determine which chargers to keep and which to throw away. I have a power supply that only has a micro USB output. With this adapter I can measure its actual performance.