When the battery capacity of iPhone is less than 80%, it should be replaced. Under normal use, the battery loss is below 80% and the battery health is below 80%. Generally, the iPhone is charged more than 500 times.
That is to say, when the iPhone is used for about 14- 18 months, the battery life will be reduced, the capacity will reach about 80%, and the battery life is generally about two years (except for abnormal use). At this time, you can consider changing the battery.
Precautions for battery replacement:
1. If you choose to replace the third-party battery, the equipment needs to be disassembled. After that, Apple officials will refuse to provide any maintenance services for the equipment.
2. Choose a third-party battery with guaranteed quality to avoid safety problems. Negotiate with the maintenance personnel to agree on the after-sales situation, so as to prevent the equipment from being used normally after replacing the battery.
Before replacing the battery, please back up the important information in the mobile phone. If necessary, all data can be erased after data backup to avoid personal information disclosure.