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.

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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.

 

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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.

 

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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.
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