Low Battery: Smoke and Heat Sensor

If a Smoke and Heat Sensor reports a low battery, we recommend replacing it as soon as possible (although you will typically have a few weeks before completely drained). Please use the below photos to identify the sensor model for which was reported to have a low battery, and refer to the corresponding directions to replace the battery.

This Smoke and Heat Sensor requires two Panasonic CR123A batteries and the typical battery life for the sensor is 3-5 years.

• Give the sensor a counter-clockwise twist to remove it from the baseplate.
• Remove the two CR123A batteries.
• Place the two new CR123A batteries into the compartment, taking care to orient the positive and negative ends correctly.
• Line up the main body with the baseplate as it was before and give it a clockwise twist to lock it in place.

This Smoke and Heat Sensor uses a built in 10 year lifespan battery.  If you see a low battery message on this sensor then the sensor itself needs to be replaced.

This Smoke and Heat Sensor requires two Panasonic CR123A batteries and the typical battery life for the sensor is 3-5 years.

• Give the sensor a counter-clockwise twist to remove it from the baseplate.
• Slide open the cover on the battery compartment.
• Remove the two CR123A batteries.
• Place the two new CR123A batteries into the compartment, taking care to orient the positive and negative ends correctly.
• Slide the cover of the battery compartment back on.
• Line up the small bump on the outside edge of the main body with the arrow cut into the baseplate  and give it a clockwise twist to lock it in place.