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

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

   An expert shares the best spots to put a smoke detector in your home to ensure your household is safe in the event of a fire. ... For sealed-battery units, the battery is often only rated for 10 ...

3. Smoke detector - Wikipedia

   en.wikipedia.org/wiki/Smoke_detector

   It was an ionization detector powered by a single 9-volt battery. [10] It cost about US$125 (equivalent to $980.72 in 2023) and sold at a rate of a few hundred thousand units per year. [8] Several developments in smoke detector technology occurred between 1971 and 1976, including the replacement of cold-cathode tubes with solid-state electronics.

4. Nine-volt battery - Wikipedia

   en.wikipedia.org/wiki/Nine-volt_battery

   Vintage PP3-size 9-volt batteries Size comparison of batteries: D, C, AA, AAA, AAAA, 9-volt (PP3) The nine-volt battery, or 9-volt battery, is an electric battery that supplies a nominal voltage of 9 volts. Actual voltage measures 7.2 to 9.6 volts, depending on battery chemistry.

5. 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]

6. Fire in truck carrying lithium ion batteries leads to 3-hour ...

   www.aol.com/news/fire-truck-carrying-lithium-ion...

   Authorities evacuated an area of Ohio's capital, Columbus, for several hours on Thursday out of fear that a fire in truck's trailer could have caused lithium ion batteries to explode. Police began ...

7. Fire alarm system - Wikipedia

   en.wikipedia.org/wiki/Fire_alarm_system

   A fire alarm system is a building system designed to detect, alert occupants, and alert emergency forces of the presence of fire, smoke, carbon monoxide, or other fire-related emergencies. Fire alarm systems are required in most commercial buildings.