The methods and precautions for Huawei mate40pro to reverse charge the gt2 are as follows:
1. Open the phone Settings and tap [Battery].
2. Turn on the switch on the right of [Wireless reverse charging].
3. Place the watch in the charging position on the back of the phone and start charging.
Huawei mobile phone to charge the watch requires hardware support. If the hardware supports it, you only need to enter the Settings of Huawei mobile phone > Battery, turn on the wireless reverse charging switch, place the watch in the center of the back of the phone, and start charging.
Due to the material reasons of some mobile phone protective cases and the thickness of mobile phone protective cases, it may affect the recognition function of mobile phone wireless charger, and it is recommended that you remove the mobile phone protective case and try again when it cannot be charged.