1. Open the phone, find \"App Store\" on the main screen of the phone, and click to open it.
2. On the App Store interface, click and select \"Search\" in the lower right corner, then enter \"Charging Assistant\" in the search box above, select the first application, and click \"Get\".
3. After downloading and installing the application, find the \"Charging Assistant\" on the main screen of the phone and click to open it
4. In the charging assistant interface, insert the phone into the charger and click \"Start\" in the middle.
5, if the power is greater than 80%, click Start will prompt \"Please test the power below 80%\"
6, when the phone is less than 80% power, insert the charger, click \"Start\
7, after a few minutes, the charging power of the current charger will be displayed below the charging power
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Open your iPhone, go to Settings, find General, and tap In
Find Law and Regulation under General and click to enter.