AT&T Digital Life Sensors

Below are instructions for replacing the batteries in a standard door/window contact sensor and a recessed door/window contact sensor. For any sensor that cannot be found in our self help articles, please text a Support Representative at 469.513.8685 or click on the chat button at the bottom of this page for additional support.

Standard Door/Window Sensor:

The door/window sensor requires a CR2032 3-volt battery, which can be purchased at your local hardware, mass retailer, or battery store.

You may also order these online here or at your preferred online retailer.

1. Insert a flathead screwdriver in the slot on one edge of the sensor (the larger of 2 parts), then gently twist open to remove the sensor from the base.
2. Remove and replace the CR2032 3-volt battery.
3. Replace the sensor onto the backplate as it was previously mounted, ensuring the alignment markers are within 1/4" of the magnet on the door when closed.

Recessed Door/Window Sensor:

The recessed door/window sensor requires a CR2 3-volt battery, which can be purchased at your local hardware, mass retailer, or battery store.

You may also order these online here or at your preferred online retailer.

To replace the battery in a recessed door/window sensor, follow steps below:

1. Remove the sensor from the door frame.
2. Remove the cover or external mounting cap to access the battery storage compartment.
3. Remove and replace the CR2 3-volt battery, then reassemble and return the sensor to the doorframe.