Execution sequence
1. Using a Phillips screwdriver with a thin blade, unscrew the self-tapping screw that tightens the two parts of the remote control case.
2. With a slotted screwdriver, inserting its blade into the groove, we separate the parts of the remote control case.
3. We remove the replaceable battery and install a new one, observing the polarity indicated on the battery holder.
4. We squeeze the parts of the remote control case until the latches snap into place. Then we wrap the self-tapping screw.