Tools/materials: iPhone 13, iOS 15.0, settings 15.0.0.
Methods/steps:
1. Enter the settings on the mobile phone, as shown in the following figure:
2. After entering the settings page, click to enter the battery, as shown in the figure below:
3. On the battery page, click Battery Health on the page, as shown in the following figure:
4. After entering the page, click the "Open the optimized battery charging" button to charge the battery, as shown in the following figure: