Open the Huawei mobile phone and find the mobile butler that comes with the system.
Find the \"Battery\" icon on the home page of the software and click to enter.
Find [Wireless reverse charging] on the new page and click the switch on the back.
Turn off or turn on the switch on the right of [Wireless reverse charging].
That's how HarmonyOS smart charging and reverse charging work works. Reverse charging can be given to other smart devices around you, such as mobile phones, Bluetooth headsets, and so on.