1. The battery compartment of the air conditioner remote controller is located at the lower part of the remote controller, that is, inside the sliding cover.
2. When replacing the battery, first open the edge of the lower part of the slide cover by hand. The slide cover is elastic, so don't worry about cracking, and then you can take off the slide cover.
3. Install a new battery on the exposed battery box.
4. Then press the sliding cover back. The buckles on both sides are elastic and will get stuck by themselves.