What battery does a Smoke Alarm take?

9V

1 × 9V battery

Most battery-powered smoke alarms use 1 x 9V battery for replacement. Some newer models use AA batteries — check the back of your alarm. Smoke alarm battery life is typically 1 year and the alarm will chirp when the battery is low. Always test your smoke alarm after replacing the battery. Lithium 9V batteries last longer and are recommended.

If your Smoke Alarm has stopped working or is unresponsive, replacing the battery will usually fix it. Tap the button below to find the right 9V battery on Amazon.

Also known as: PP3, 6LR61, MN1604