The battery in your smoke detector should be something that you can rely on. That's why at First Alert, we recommend upgrading to a 10-Year Sealed Battery Smoke Alarm. 9V vs. AA Batteries. 9V has been the battery of choice for smoke alarms for many years. However, nowadays, a more common smoke detector battery is two or three AA's.. Can connect to other compatible BRK or First Alert CO and smoke detectors; Light indicates if the alarm is for smoke or for carbon monoxide;. Backup Battery Type: Alkaline: Backup Battery Size: 9V: Hardwired Interconnectivity: Yes: Sound Level: 85dB at 10 feet: Product Height: 1.9 in: Product Length: 5.6 in: Product Width: 5.6 in: Product.
The availability of battery operated smoke alarms in a variety of styles opens a wealth of options to explore. First Alert Battery Operated Ionization Alarms come equipped with an ultra-reliable ionization sensor that provides the earliest possible warning of fast-flaming fires. First Alert Battery Powered Photoelectric Alarms use a sensor that.. The First Alert SA340 smoke alarm has a sealed, non-replaceable 10-year lithium battery. When the battery expires, you must replace the entire unit to ensure. Battery Type: 9V Alkaline The First Alert SA340 uses a 9V alkaline battery for power. This type of battery is widely available and offers reliable performance. Alkaline batteries are.