DesignLine Garage Door Sensor
Note: You will need a small flathead screwdriver.
Remove the cover by pressing the screwdriver into the slot on the bottom of the sensor and twisting it 90 degrees.
Locate the battery.
Gently pry out the battery by placing the screwdriver in the slot between the battery and the metal clip.
Note the battery terminals (+, -).
Place a new battery in the device (CR2032) with the + sign facing out.
Replace the lid on the device, making sure the tamper switch is aligned with the plastic tamper tab. Press in until you hear a click.