How to Replace the Entry Sensor's Battery

The Entry Sensor takes one Duracell 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.

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 (opens in new tab) on your phone or tablet

2. Choose My System from the bottom navigation bar

3. Select Device Settings (opens in new tab)

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 (opens in new tab).