How to Replace Motion Sensor Gen 2 Battery
The Motion Sensor Gen 2 takes a single CR-123A Lithium 3V battery and has a life expectancy of up to 4 years depending on placement and usage.
To change your Motion Sensor Gen 2 battery, slide the sensor up and off its bracket. Then, replace the battery and slide it back onto its bracket.
If your sensor is still offline after taking these steps, skip to "Is your Motion Sensor Gen 2 offline after replacing the battery?" section of this article for troubleshooting steps.
Is your Motion Sensor Gen 2 offline after replacing the battery?
If the sensor does not come back online after changing the battery, it’s possible that your sensor has been offline for too long. The best step would be to remove the sensor from the SimpliSafe® Mobile App and then add it back to your system.
To remove your Motion Sensor Gen 2:
Open the SimpliSafe® Mobile App (opens in new tab) on your phone or tablet
Choose My System from the bottom navigation bar
Tap on the sensor you wish to remove
Choose ‘Remove Device’
Once you have removed your sensor, you can add it back using our Installation Guide (opens in new tab).