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2. Here's Everything You Need to Know About Smoke Alarms - AOL

   www.aol.com/heres-everything-know-smoke-alarms...

   Some states (like California) require battery powered smoke alarms that last up to 10 years. The batteries in these are inaccessibly sealed, and the beeping means it's time to replace the whole ...

3. Smoke detector - Wikipedia

   en.wikipedia.org/wiki/Smoke_detector

   Smoke detectors in large commercial and industrial buildings are usually connected to a central fire alarm system. Household smoke detectors, also known as smoke alarms, generally issue an audible or visual alarm from the detector itself or several detectors if there are multiple devices interlinked. Household smoke detectors range from ...

4. First Alert - Wikipedia

   en.wikipedia.org/wiki/First_Alert

   On September 4, 1992, BRK recalled all hardwired smoke alarms under the series 1839I and 2839I due to testing programs determining that corrosion could form on the alarm horn's electrical contacts, causing the piezo to fail to make any noise. [6] In May 2006, First Alert combination smoke alarms were recalled due to draining batteries rapidly. [7]

5. Fire alarm system - Wikipedia

   en.wikipedia.org/wiki/Fire_alarm_system

   The batteries can be either inside the bottom of the panel or inside a separate battery box installed near the panel. Initiating devices: These components act as inputs to the fire alarm control unit and are manually or automatically activated. Examples include pull stations, heat detectors, duct detectors, and smoke detectors.

6. The Best Place to Put Your Smoke Detector (Plus 3 Spots ... - AOL

   www.aol.com/lifestyle/best-place-put-smoke...

   Replace smoke detectors at least every 10 years: Don't place your life in the hands of an outdated smoke alarm. For the most part, you can plan on replacing your smoke detector at least every 10 ...

7. Security alarm - Wikipedia

   en.wikipedia.org/wiki/Security_alarm

   Ionization smoke alarms can quickly detect the small amounts of particles produced by fast-flaming fires, such as cooking fires or those fueled by paper or flammable liquids. A newer type of the smoke detector is the photoelectric smoke detector. It contains a light source, which is positioned indirectly to the light sensitive electric sensor.