My answer?
1. The Red rice mobile phone keeps dropping after being charged, because the power controller of the mobile phone motherboard is broken.
2. Because under normal circumstances, the mobile phone motherboard is protected by power charging, if it is fully charged, the power will automatically break off and no longer charge the battery, but if the device is broken, it will always be charged. In this case, it is necessary to repair immediately, if you keep charging, the battery will explode and appear dangerous.