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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 the 9V 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. Carbon monoxide detector - Wikipedia

   en.wikipedia.org/wiki/Carbon_monoxide_detector

   The devices can either be battery-operated or AC-powered (with or without a battery backup). Battery-powered devices advertise a battery lifetime of up to 10 years. The gas sensors in CO alarms have a limited life span, typically two to five years. [7] Newer models are designed to signal a need to be replaced after a set period.

4. Wireless security camera - Wikipedia

   en.wikipedia.org/wiki/Wireless_security_camera

   However, some wireless security cameras are battery-powered, making the cameras truly wireless from top to bottom. Wireless cameras are proving very popular among modern security consumers due to their low installation costs (there is no need to run expensive video extension cables) and flexible mounting options; wireless cameras can be mounted ...

5. Flashlight - Wikipedia

   en.wikipedia.org/wiki/Flashlight

   Some rechargeable flashlights have indicators for the state of charge of the battery. Power-failure lights are designed to keep their batteries charged from a wall plug and to automatically turn on after an AC power failure; the power-failure light can be removed from the wall socket and used as a portable flashlight.

6. Mechanically powered flashlight - Wikipedia

   en.wikipedia.org/wiki/Mechanically_powered...

   Mechanically powered flashlights were distributed by aid organizations to survivors of the 2010 Haiti earthquake since electric power was lost for a long period. A mechanically powered flashlight (UK: mechanically powered torch ) is a flashlight that is powered by electricity generated by the muscle power of the user, so it does not need ...

7. College basketball player collapses and dies after workout

   www.aol.com/college-basketball-player-collapses...

   A basketball player at Alabama's University of Mobile is dead after collapsing after a gym workout, according to his coach. Kaiden Francis was a freshman basketball player from Fort Lauderdale ...