If the Xiaomi Watch 2 experiences abnormal power on/off behavior after being removed from the wrist for an extended period, especially in temperatures below 0 degrees Celsius, follow these steps:
1. Place the watch in an environment with a temperature above 0 degrees Celsius to warm up it;
2. Keep the watch connected to the charger for some time to ensure it has adequate power before attempting to turn it on again.
It is recommended to avoid leaving the watch off the wrist for extended periods in low-temperature environments. Prolonged exposure to temperatures below 0 degrees Celsius can affect the watch's performance. If the watch exhibits power on/off issues after such exposure, warming it up and ensuring it is charged should help restore normal functionality.