hello jozefvaclavik Do You have more pictures on the pcb inside the battery. I´m trying to charge the battery with an voltage DC power supply. But it seams that the monitoring circuit in the battery prevents such charging. Could you see any marking on the circuits so we can find out which manufacturer on the circuits. /Markus

seems like a sensor in the optics don't have connection to the mainboard anymore or intermittent connection. Probably because some soldering has shaken apart. /Markus