Connect the two phones with OTG or a two-end cable, and then slide the screen of one Huawei phone down.
Click charging via USB.
Selective reverse charging
After selecting reverse charging, turn on the other Huawei phone.
The other Huawei phone will show charging.
1. Click to open [Settings] on the desktop of the phone;
2. In the Settings menu, find and click on [Battery];
3. Open the switch button on the right side of [wireless reverse charging] and put the two mobile phones back to back together.
First, turn on the wireless reverse charging function of the mobile phone, and put the two mobile phones back to back together to automatically charge