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The original item was published from 11/3/2022 8:20:13 AM to 11/3/2022 8:22:34 AM.

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Emergency Preparedness

Posted on: November 3, 2022

[ARCHIVED] Test Your Smoke Alarms When You Turn Your Clocks Back

Test Smoke Alarms When Turning Back Clocks

Daylight saving time ends at 2:00 a.m. on Sunday, November 6.  Many people will use this opportunity to test and change their home’s smoke alarm batteries.

Because working smoke alarms are a critical element of home fire safety, Southern Marin Fire District NFPA supports any and all efforts to reinforce the importance of working batteries. However, today’s smoke alarms are not all designed the same, making battery messaging more nuanced.

Following is information to help make sure all smoke alarms have working batteries, accounting for the multiple types of smoke alarms on the market and their varying battery requirements:

  • Smoke alarms with non-replaceable 10-year batteries are designed to remain effective for up to 10 years. If the alarm chirps, warning that the battery is low, replace the entire smoke alarm right away.
  • Smoke alarms with any other type of battery need a new battery at least once a year. If that alarm chirps, warning the battery is low, replace the battery right away.
  • When replacing a battery, follow manufacturer’s list of batteries on the back of the alarm or manufacturer’s instructions. Manufacturer’s instructions are specific to the batteries (brand and model) that must be used. The smoke alarm may not work properly if a different kind of battery is used.

Please note that smoke alarms should be replaced after ten years. If you purchased your smoke alarms on or before November 2012, it is a good idea to replace them.

Review more smoke alarm safety tips by visiting NFPA.org

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