The type of smoke alarm, the device's power drain, and how often the alarm is triggered also plays a role in the battery longevity. Generally, the best 9v battery for a smoke detector may last ...

As expected from an ionization detector, it had the best performance detecting ... but it comes with a 9-volt battery as backup. Onelink Battery Powered Smart Smoke and Carbon Monoxide Detector ...

By Courtney Lindwall, Daniel Wroclawski Reliable smoke ... Battery-powered detectors are wireless, which means they can be installed anywhere. They typically use replaceable batteries (usually 9 ...