You can easily test the 1-2A output mobile power, mobile phone charger, USB power supply output current is standard or not,
1. Insert the USB 1-2A output device port.
2. Toggle switch allows the output current between 1A and 2A Switching.
Resistance will be hot when the module is working, the temperature at around 80 ~ 85 °c, please beware cooling.
3 x USB charge current detection