[ZenFone Max] What is reverse charging?
Reverse charge is a function that you can charge other devices by using ZenFone Max's high capacity battery.
* To use the reverse charge function, an OTG cable is required.
Charge another device:
1. To use the reverse charge function, connect the OTG cable to ZenFone.
2. Connect the USB cable to another device.
3. You can charge by connecting the USB cable and the OTG cable.