1. First, we need to turn on the phone, unlock the iPhone and wait for the system to enter the main page.
2. After entering the main page, as shown in the figure below. Find the settings item on the desktop, and click Settings to enter the iPhone settings page.
3. After entering the settings page, as shown in the figure below. Slide down the page and find the battery entrance in the page.
4. As shown in the figure below, it is the battery entrance. Click on the battery to enter the battery status page.
5. At the bottom of the battery page, there is a battery health entrance. Click Battery Health to enter the battery health query.
6. As shown in the figure below, the battery health is under maintenance, and the maximum capacity of the battery is 75%. Less than 80% of the capacity is under maintenance.
How to check the battery health of iPhone (Apple)