How often should I replace the battery in my smoke, CO and natural gas alarms?

Many of our alarms come with a 10-year sealed Permanent Power™  battery that never needs replacing during the 10 year life of the alarm. Batteries in non sealed alarms should be replace at least once a year or when the low battery signal sounds. Permanent Power™ battery technology helps keep you safe, because working smoke alarms are an important factor in surviving a home fire.

 

*UL217 Smoldering Smoke Test on 5/26/2010, Underwriters Laboratories Project #09CA38078.

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