• AdamEatsAss@lemmy.world
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    6 months ago

    Failing to an alarm on state is preferred to an alarm off state. So at least no fire can sneak up on you. I think they sell ones now that are 10-year sealed battery with a 10-year warranty.

    • xpinchx@lemmy.world
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      6 months ago

      My building has these and 2 of them failed in the first year. Can’t replace the battery so had to replace the whole thing.

    • ouRKaoS@lemmy.today
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      6 months ago

      I agree. If it fails by alarming constantly you replace it. If it fails by not alarming at all you never know, because who actually tests their alarms?