Nako Na 613D LCD Timer for Vehicles, Boats, ATV, Quadcopters
If the screen is glitching or the alarm is going off randomly at odd hours (like 12:00 AM), the internal battery may be dying. The device runs on a small button cell battery (commonly an LR44 or AG13). You can replace it by gently prying the clock out of its dashboard mount and sliding the rear battery cover off. Resetting the Clock nako na-613d disable alarm