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

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

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how long to change the 9 volt battery


Thank you for your question, Kevin. We recommend replacing the batteries in your smoke alarm every six months. If you have any additional questions or concerns, please don't hesitate to reach out to our Consumer Support team at First Alert at 1 (800)-323-9005.

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