1, the battery life is less than 80%. If Apple's mobile phone has been used for more than two years, the battery capacity of the mobile phone is obviously not as durable as when it was bought before, then the battery may not work at this time. According to Apple's official statement, the battery of Apple's mobile phone needs to be replaced after about 600 cycles. At this time, we can check the maximum capacity of the battery through the settings of mobile phone-battery-battery health and charging. If the maximum battery capacity is less than 80%, the phone will display the words maintenance.
2. The battery has been replaced. Apple's mobile phone model from xs, Apple officially encrypted the battery and motherboard. Once the mobile phone went to an unofficial store to replace the battery, the mobile phone would prompt for non-genuine parts, and the words "battery maintenance" would be seen in the settings. In this case, it will not affect the use of our mobile phone, but the battery health of the mobile phone cannot be seen in the settings.