1. See Figure 19. Using a thin, flat object, slowly turn the slot «for thumb nail» (1), which is located on the side of the keychain - after this the keychain can be separated into two halves.
Figure 19. Wireless key fob battery: 1. Slot «for thumb nail»; 2. Battery; 3. Serial number of the key fob
2. Take out the battery (2) and throw it away.
Note. Dispose of the old battery in accordance with local government regulations.
3. Install a new battery (Panasonic 2032 or equivalent), with the positive terminal of the battery facing down.
4. Put the two halves of the keychain back together and fasten them together (press them on both sides with your fingers, you will hear a click).