Battery replacement (controller) - SmartRelay AX Classic
NOTE
Shorter battery life due to poor contact
Skin oil impairs contact between the battery and the battery holder.
- Do not touch the contacts on new batteries with your hands when replacing old ones.
- Use clean cotton gloves free of fat or grease.
Dispose of the batteries as per local and country-specific regulations.
- Controller disconnected from power supply.
- Unscrew the screws for the SREL AX Classic controller cover (PH2).

- Remove the backup battery.
- Insert the new backup battery (positive pole facing away from the circuit board).
- Fasten the cover into place again.

- Reconnect the power supply.
- Backup battery replaced.