1, light up the phone, enter the main interface of the phone, and find the settings that come with the iOS system.
2. Enter the setting interface, slide up or search to find the battery option.
3. Enter the battery interface, find the battery health option, and click.
4. Above the battery health interface, you can see the maximum capacity of the battery. Apple officially recommends that the battery can be replaced when the battery power is lower than 80%.
5. In the middle of the battery health page, there is also an option to optimize battery charging. After being turned on, the iOS system will learn the charging mode to delay aging, which is very practical for friends who value battery health.