How to check the battery health
1. Touch Settings.
2. Touch Battery.
3. Touch View All Battery Usage.
4. These figures show how long the screen has been active and how long the screen has been idle. Touch Back.
5. Touch Battery Health.
6. Your iPhones battery health is displayed.
Note: Screens, functions and options shown in this guide are for reference only and may only be applicable to certain models of phone.