Low Battery: Carbon Monoxide Sensor

If a Carbon Monoxide 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 Carbon Monoxide Sensor takes 2 CR123A batteries and the typical battery life for the sensor is 3-5 years.

  • Rotate the body counterclockwise to remove it from the back casing.
  • Slide open the battery compartment to replace the 2 CR123A batteries on the back of the body.
  • Reattach the battery cover then attach the body back to the base with a clockwise twist.

 

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This Carbon Monoxide Sensor takes 3 AA batteries and the typical battery life for the sensor is 3-5 years. 

  • Slide the body sideways to remove it from the back casing.
  • Replace the 3 AA batteries on the back of the body.
  • Slide the alarm body back onto the mounting plate. The mounting plate will not close if all three batteries are not installed.
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