With the help of iBackupBot of iTunes or itools, the usage status of iPhone battery can be detected. Here, itools is taken as an example to illustrate.
The first step is to install Baidu "itools" on the PC;
Step 2, connect the iPhone to the computer through the data cable;
Step 3: After the connection is successful, you can see the battery cycle times, capacity and other information on the home page.
Generally speaking, the iPhone battery can still retain 80% of the original battery capacity after 400 charge and discharge cycles. When the battery can no longer store enough energy to maintain the normal operation requirements, it is necessary to replace the battery.