1. Open iPhone, click Settings, and then select Privacy. In terms of privacy, there is an "analysis" at the bottom, click to enter;
2. If the item "Enjoy iPhone Analysis" is opened, you can click "Analyze Data" below. If not, start "Analysis" first;
3. Click "Analyze Data" to enter the next page, select the latest day from the log, including all the information used by the mobile phone on this day, and click "Enter";
4. Find the battery.maxCapacity, two in the following line.
5. You can also download the battery life installation in the APP Store, click the menu on the right, and select the original data to see the information of battery loss. If the tested loss value is higher than 15%, it is recommended to replace the mobile phone or battery.
A hundredfold care, 10 satisfaction.