The Entry Sensor takes one (1) CR-2032 Lithium 3V battery and has a life expectancy of up to 5 years depending on placement and usage.

To change your Entry Sensor battery, slide the sensor up and off its bracket. Then replace the lithium battery and slide the sensor back onto its bracket.

If your sensor is still offline after replacing the battery, skip to the section below for troubleshooting steps.

Is your Entry Sensor offline after replacing the battery?

If you find that your sensor does not come back online after replacing the battery, it’s possible that it may have 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 Entry Sensor:

1. Open the SimpliSafe® Mobile App on your phone or tablet

2. Choose My System from the bottom navigation bar

3. Select Device Settings

4. Tap on the sensor you wish to remove

5. Choose ‘Remove Device’

Once you have removed your sensor, you can add it back using our Installation Guide.