How to check the health of iPhone battery?

1. Because the "Battery Health" function is only added in 1 1.4 and above, first check whether the system is 1 1.4 and above.

1, click "Settings";

2. Click "General";

3. Click "About this machine";

Check the column of version number. If it is more than 1 1.4, then go directly to step 2.

If it is lower than 1 1.4, continue the following steps and upgrade to the latest version.

4. Return to the previous interface and enter "Software Update";

5. Click "Install Now" and wait for the phone to restart.

2. Confirm that the system version is above 1 1.4 or after restarting and upgrading.

1, click to enter "Settings";

2. Click "Battery";

3. Click "Battery Health";

4. After input, you can see the percentage of the maximum capacity of the battery. The closer this maximum capacity is to 100%, the newer and healthier the battery is, and vice versa.