What battery does a Carbon Monoxide Alarm take?

3 × AA batteries

Most battery-powered carbon monoxide alarms and CO detectors use 3 AA batteries. Some models use 2 AA batteries — check the back of your alarm. CO alarm battery life is typically 1 year. The alarm will chirp when the battery is low. Carbon monoxide detectors should be replaced completely every 5-7 years regardless of battery condition.

If your Carbon Monoxide Alarm has stopped working or is unresponsive, replacing the batteries will usually fix it. Tap the button below to find the right AA batteries on Amazon.

Also known as: LR6, MN1500, Mignon