I used an old tablet to operate a smart home. In order to work continuously, I took the battery out of it and connected it to a 4V power source, which works continuously. Based on the measured battery resistance between GND and BSI, I soldered a 10k resistor. After this treatment, the tablet works properly, only despite the constant voltage level, the battery level drops after a few hours to 1%. I would not have a problem with it if the battery saving function did not limit the capabilities of the device. Is there any way to turn it off? The tablet has root access.