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2. Smoke detector - Wikipedia

   en.wikipedia.org/wiki/Smoke_detector

   Residential smoke alarms are usually powered with a 9-volt battery, or by mains electricity. Some smoke alarms use a combination of the 2; usually using a battery as an extra power source in the event of an outage. Commercial smoke detectors issue a signal to a fire alarm control panel as part of a fire alarm system. Usually, an individual ...

3. 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. Batteries of various sizes and capacities are manufactured; a ...

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

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

   Combined sensing: While a standard smoke detector only senses smoke, one with combined sensing can detect both smoke and heat. "This feature detects various types of fires, such as those caused by ...

5. Lithium-ion battery - Wikipedia

   en.wikipedia.org/wiki/Lithium-ion_battery

   A lithium-ion or Li-ion battery is a type of rechargeable battery that uses the reversible intercalation of Li + ions into electronically conducting solids to store energy. In comparison with other commercial rechargeable batteries, Li-ion batteries are characterized by higher specific energy, higher energy density, higher energy efficiency, a longer cycle life, and a longer calendar life.

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. Comparison of commercial battery types - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_commercial...

   Under certain conditions, some battery chemistries are at risk of thermal runaway, leading to cell rupture or combustion.As thermal runaway is determined not only by cell chemistry but also cell size, cell design and charge, only the worst-case values are reflected here.

8. List of battery sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_battery_sizes

   In Switzerland as of 2008, 4.5-volt batteries account for only 1% of primary battery sales. [89] PP3, 9-volt, or E [90] Radio battery Smoke alarm battery Square battery Transistor battery 006P MN1604 Type Krona (Soviet Union/Russia) 6LR61 (alkaline) 6LP3146 (alkaline) [91] 6F22 (carbon‑zinc) 6KR61 (NiCd) 6HR61 (NiMH) 1604A (alkaline) 1604D ...

9. 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.