How To Change a Carbon Monoxide Detector Battery
Written by Naomi Ramirez
Updated at August 4th, 2025
Table of Contents
Changing Your Carbon Monoxide Detector Batteries
If you have received a Carbon Monoxide Detector Low Battery message on your panel, you will need to replace the battery promptly to ensure the device continues to function properly. Information to order replacements can be found in our article, How to Order Replacement Batteries.
How to Replace Battery
- Disarm your Cove alarm panel before you begin this process
- Open the Carbon Monoxide Detector by turning the detector counterclockwise until the back cover releases.
- Pay close attention to the orientation of the (+) and (-) sides of the battery.
- Place 2x AAA Duracell Alkaline MN2400BK Batteries in the detector
- Wait 20 seconds while the Carbon Monoxide Detector resets
- Turn the Carbon Monoxide Detector clockwise back into place on the mounting plate
