Indoor siren help
Replacing the Batteries
Your siren comes pre-installed with two "AA" NiMH batteries that provide 24-hour battery backup in case of power loss. When it's time to replace them, you will be alerted on the O2 Home app/website.
Turn the siren over and unscrew the battery compartment cover. Then, insert the batteries and re-attach the cover.
The LED shows the system status, as follows:
- Solid Green—unit is AC powered, and backup battery is good.
- Blinking Green—unit running on backup batteries, no AC power.
- Off—Backup battery discharged, and no AC power.