We open the service cell, enter the "Debug Mode", open the cells
1) Enter the code of the return box. The return box code can be found on the home page of the bookmark site.
2) Disconnect one cable from the battery.
3) We hold down the "1" key and without releasing the key, we connect the disconnected contact (cable) to the battery
4) We are waiting for 10 seconds. Press button "5".
5) All boxes are openable