I have a problem with my Roborock S50. The device cannot be started when the charger is not connected. When connected to the charger, the device starts up to the time it says charging, then restarts. The loop does not end. I tested the Battery, it got 15.1V. Check the charging pin when the device is booting is 16.4V. When I remove the battery, the device boots up error 13 (no battery) and restarts. The loop does not end. I tried to reset the device to default but it didn't work. Can anyone help me with this problem??