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According to NFPA research, 96 percent of US homes have at least one smoke alarm. Unfortunately, at least 23 percent of them are useless because they do not have working batteries.

Homes with smoke alarms that don't work now outnumber homes that don't have any smoke alarm at all.

Two thirds of deaths in fires in the home occur in homes without working alarms.

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12y ago

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Do I need a battery smoke detector as a backup?

If your home smoke detector is tied into your electricity and is equipped with a battery backup you should not need an additional smoke detector. You should insure that the batteries are charged and that the smoke detector is functioning properly at least once a month if not more often.


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To test a smoke detector effectively, press and hold the test button on the device until it sounds an alarm. Make sure to test the smoke detector monthly and replace the batteries at least once a year.


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The smoke detector is beeping because it is detecting smoke or a low battery.


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Turn off power to the area where the smoke detector will be installed. Remove the old smoke detector, if applicable. Connect the new smoke detector to the existing wiring. Mount the smoke detector on the ceiling or wall using screws. Restore power and test the smoke detector to ensure it is functioning properly.


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