Co-Authored By:
Asked by: Uberney Hefner
home and garden smart homeHow often should you change smoke detector batteries?
According to the U.S. Fire Administration (USFA), smoke detectors should be tested at least once a month and batteries should be replaced at least once or twice a year.
Hereof, how long does a 9 volt battery last in a smoke detector?
10 years
Additionally, how long do AA batteries last in smoke detectors?
The same reliability that comes from our smoke and carbon monoxide alarms can now be found in our two year power supply - a AA battery that's guaranteed to power a Kidde smoke alarm or carbon monoxide alarm for 2 years or we will replace it.
1. EN22 Energizer Industrial Alkaline 9V Battery. The industry favorite 9-volt battery for battery-operated smoke alarms from a mega-brand – this is one of the very best 9v batteries for smoke detectors.