The wireless reverse charging function of the Mate20Pro requires \"Reverse charging\" to be turned on in the Settings to be used.
Material\/Tool: Mate20Pro.
First, open the \"Settings\" on the mobile desktop.
2. Find \"Battery\" in \"Settings\" and click to enter.
Third, click \"Wireless reverse charging\" in the \"Battery\" to turn on the function.
Finally, the Mate20Pro and another mobile phone that supports reverse charging can achieve reverse charging on the back side.