How to Replace the Battery of a Carbon Monoxide Detector?

The carbon monoxide detector is a great device that can save your life. It detects dangerous levels of Carbon Monoxide (CO) gas in the home and alerts you so you can take appropriate action. But what can you do when it’s time to change the battery? In this blog post, we will discuss how to properly replace the battery for a carbon monoxide detector.

How to replace the battery of a Carbon Monoxide Detector?

It’s important to make sure your carbon monoxide detector is working. Carbon Monoxide (CO) can be deadly, and it may not always be obvious when the gas is present. For this reason, it’s essential that you check on your CO detector as often as possible and see if its needing battery replacement any time soon.

If you’re ready to change the battery in your carbon monoxide detector, then there are a few things that you’ll need to do before getting started:

  • New battery for Carbon Monoxide Detector. Check the manual of your device or contact the manufacturer for which type of battery is the best for your device.
  • Phillips head screwdriver and other tools as necessary based on the model type
  • Safety glasses (which is optional)
  • The most important action is to disarm your carbon monoxide detector. You might also need to inform your local central station that you are going to replace the battery. Some models may require you to log online with your account to deactivate the system and change to testing mode. Always check with the manufacturer for best practices.

To replace a Carbon Monoxide Detector Battery, you will need to follow these steps:

  • Remove the carbon monoxide detector from the mounting plate by rotating it counterclockwise carefully. The keypad may emit a beeping sound if the device has been opened.
  • Take the old battery out. You may use a flat head screwdriver to help you with this process if there is one that’s holding it in place.
  • Wait for about 30 seconds, then insert the new battery by following the correct polarity.
  • Realign the device back to the mounting plate and secure it by rotating it clockwise until a click sound is heard.
  • To test the device, press the test button for about 30 seconds to check if the device is working properly. Wait for the signal confirmation before turning off the test mode, or inform your local central monitoring station that you have completed the battery replacement procedure.

How often should you replace the battery of your Carbon Monoxide Detector?

The response to this question is different for every model and manufacturer. However, it’s important to know that most models require a new battery at least once per year. Most carbon monoxide detector models need AA or 9V battery replacements. Rechargeable batteries are not suggested, though. The battery’s life is determined by the state of the battery, the type of your CO alarm, and how it was installed.

If the device begins “chirping” which means low battery warning, replace carbon monoxide detector battery as soon as feasible. This warning is produced through a beep every minute, which means the device has a low battery. To find out more about changing your specific model’s battery, check its user manual or consult with an expert or with your manufacturer.

When should you test your Carbon Monoxide detectors?

Carbon monoxide detectors are a great way to keep you and your loved ones safe while at home. It’s important that they work properly, though, so be sure not to neglect them! To avoid the chirping sound from the carbon monoxide detector, it needs new batteries for it to work. Changing your clock times in fall and spring is also a good reminder of when you should also replace the batteries in your carbon monoxide detectors and do it more regularly too.


It’s important to follow the detector manufacturer’s guidelines for optimal functionality and safety. Make sure you clean your detectors with a damp cloth, test its sound every month (or more often if needed), and push it back in when returning it from an outlet. Change the battery the very first time you hear the beep sound, and do not hesitate to replace it right away. It might malfunction if you ignore the signs that the battery is getting weak.

If you found your carbon monoxide detector acting strange than usual, it might be time to get your detectors checked by a professional. These experts will then be able to tell you if your device needs replacing or servicing.

Remember that carbon monoxide is odorless, colorless; therefore, we need these devices around our homes. Keeping these devices in good condition all the time will give you peace of mind while at home.

About the author, Phil Borges

Phil Borges is a battery aficionado. He's written extensively about batteries, and he loves nothing more than discussing the latest innovations in the industry. He has a deep understanding of how batteries work, and he's always on the lookout for new ways to improve their performance.