How to check the battery health by adding a mobile phone?

1. View through the engineering test mode of Android: Enter 4636 on the mobile phone dialing page to view battery information, mobile phone information, usage statistics, WLANinformation, etc. , including power level.

2. View through one plus diagnostic APP: Search for one plus diagnostic APP in the application mall, open the app after downloading and installing, and you can see the battery loss status and other related information on the home page.