When the health is lower than 80%, the system will force the performance management function to be turned on, and the mobile phone will get stuck in some cases. This restriction can only be lifted by replacing the battery.
If the mobile phone is under warranty or under AppleCare+ service plan, you can enjoy the service of replacing the battery for free.
Precautions for Apple Battery Maintenance
1.The battery health of iPhone depends largely on the number of battery charging cycles, and the battery health will decrease a little with each cycle. Try to avoid over-charging and over-discharging-it is generally recommended to charge the mobile phone when the battery is only 20~30%, and disconnect the charging when the battery is 80~90%.
2. When using the iPhone, it is forbidden to run power-consuming applications while charging, otherwise frequent charging and discharging will aggravate the aging of the mobile phone battery and lead to a decline in battery health.