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10-Year Battery Hardwired (with Battery Back-Up) Ionization Interconnected Smoke detector

First Alert 10-Year Battery Hardwired (with Battery Back-Up) Ionization Interconnected Smoke detector

4.7
620
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33 Questions
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What size battery does it use


It does not come with a battery. You install a 9-volt that works if the power goes out. Replace the 9-volt once a year.

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Battery is built in and last for 10 years. Doesn't require replacement since the detector should be replaced every 10 years.

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