How Long Does A 9v Battery Last In Smoke Detector?

10 years

What is the best 9 volt battery for a smoke detector?

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.

How often should you change batteries in smoke detectors?

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.

Can I use a regular 9 volt battery in my smoke detector?

Most smoke alarms use 9-volt alkaline batteries, but some use AA. So if this is the first time you’ve replaced yours, do open the battery compartments on your units and check before heading to the store. You wouldn’t want to waste that extra hour.

How long do smoke detectors batteries last?

Most smoke alarms have a lifespan of eight to 10 years, and again, replace the batteries every year. A smoke detector with a lithium battery or a hard-wired smoke detector can last 10 years, at which time you would just replace the whole unit. Carbon monoxide detectors last between five and seven years.