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My smoke alarm is connected to the mains electricity. No need for new batteries ever. Just a simple extension from the power outlets in the attic and down throu
by highace 13y ago
My smoke alarm is connected to the mains electricity. No need for new batteries ever. Just a simple extension from the power outlets in the attic and down through the ceiling.
- zwily 13y agoThey should still have a battery backup.
- joeshaw 13y agoIn the US, current fire codes require that hardwired smoke detectors also have a battery backup. http://artisanelectric.net/blog/the-big-picture/how-old-are-your-smoke-detectors-when-was-the-last-time-you-tested-them/ http://artisanelectric.net/blog/the-big-picture/how-old-are-... http://www.nfpa.org/codes-and-standards/document-information-pages?mode=code&code=72 http://www.nfpa.org/codes-and-standards/document-information...