Xiaomi smart door lock didn't find the camera battery.

Because the battery is dead, Xiaomi fingerprint lock can't detect the camera battery. In this case, it is necessary to charge the battery in time.

When the battery is dead, the smart lock will generate a low voltage alarm prompt. If the alarm prompt of "beep, beep, beep" appears, it will remind the user that the battery of the door lock is insufficient, and it is necessary to replace the battery of the door lock in time or use USB to charge it.