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 ...

The best ones don’t just ... off to preserve power on the battery-only models. The Nest Protect is extremely expensive compared with a standard smoke and CO alarm. To fully equip a two- or ...

In a standard smoke alarm, the battery will need to be replaced every 12 months to keep it working effectively. This is because smoke alarm sensors degrade over time, leading to a reduced ...