Door/Window Sensor

1
one

Depending on the orientation of the sensor, you may have to pull up or down to remove the cover.

2
two

Locate the battery.

3
three

Gently remove the battery. You may use a small flathead screwdriver if this proves difficult.

4
four

Note the battery terminals (+, -).

5
five

Place a new battery in the device (CR2032).

6
six

Replace the cover on the device. Press in until you hear a click.