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2. Exit sign - Wikipedia

   en.wikipedia.org/wiki/Exit_sign

   As battery-backup systems became smaller and more efficient, some exit signs began to use a dual-power system. Under normal conditions, the exit sign was lit by mains power and the battery was maintained in a charged state. In the event of a power outage, the battery would supply power to light the sign.

3. Wincrest Nursing Home fire - Wikipedia

   en.wikipedia.org/wiki/Wincrest_Nursing_Home_fire

   All of the buildings electrical system were composed of system II required emergency exit signs and corridor lighting system. The system operated an automatic transfer switch which operates the emergency lights in case of power failure. The third floor of the building complex had battery powered emergency lighting. [3] [4]

4. Emergency light - Wikipedia

   en.wikipedia.org/wiki/Emergency_light

   An emergency light is a battery-backed lighting device that switches on automatically when a building experiences a power outage. In the United States, emergency lights are standard in new commercial and high occupancy residential buildings, such as college dormitories , apartments , and hotels .

5. Smoke detector - Wikipedia

   en.wikipedia.org/wiki/Smoke_detector

   A user-operated test button simulates an imbalance between the ionization chambers and sounds the alarm if and only if the power supply, electronics, and alarm device are functional. The current drawn by an ionization smoke detector is low enough for a small battery used as a sole or backup power supply to be able to provide power for years ...

6. Hawaii fireworks explosion victims flown to Arizona center by ...

   www.aol.com/news/hawaii-fireworks-explosion...

   PHOENIX — The U.S. military flew six victims from the tragic New Year's fireworks explosion in Honolulu to an Arizona facility due to limited bed space at Hawaii's only burn center, officials said.

7. Alex Ovechkin takes part in a full Capitals practice. He ...

   www.aol.com/alex-ovechkin-takes-part-full...

   Ovechkin has only missed 50 games because of injury over his 20 seasons in the NHL, tremendous durability for a physical player that has allowed him to take a shot at Gretzky's record.