How to diagnose the health of iPhone7 plus battery?

Step 1: First, you need to download and install a software called "iBackupBot" in your computer. It can be searched by Baidu or downloaded by iTunes. After downloading, open and install iBackupBot software on your computer.

Step 2: Connect the iPhone7 and 7 Plus to the computer through the data cable, and then the iBackupBot software will automatically identify your iPhone 7 battery information. Then click the "More Information" option in the software interface, and a battery information window will pop up. The first information displayed is the iPhone battery information.

Generally speaking, after 300-500 cycles, the battery capacity will drop to about 80% of the initial value. When an iPhone battery is detected to have too many cycles, it means that the phone has been used for a long time. If your iPhone battery has been cycled more than 400 times, it means that the battery consumption is relatively high, so it is recommended to replace it with a new battery to avoid affecting the battery life.