The app will alert you when the sensor battery is low. The sensor uses a CR2032 lithium coin cell battery. You can check the battery level for each of your sensors in the app under Devices. A battery should last two years or more depending on use.
To change an Entry Sensor battery:
- Locate the battery cartridge on the top of the sensor.
- Pull the battery cartridge out.
- Replace the battery with the positive (+) side facing outward.
- Replace the sensor cover.
- Remount the sensor.