The remote control contains a 3V CR2032 lithium battery.
The supply voltage is normal if, when pressing the remote control buttons, a short flash of the LED indicator occurs.
The voltage is below normal if, when pressing the remote control buttons, the LED indicator lights up with two short flashes or does not light up at all.
You will need flat and Phillips screwdrivers.
1. Remove the screw that secures the cover of the remote control housing..
2.... remove the cover from the body..
3.... and, overcoming the resistance of the latch, remove the battery.
4. Install a new battery and assemble the remote control in the reverse order of removal. When installing the element, pay attention to the polarity of the element connection.