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  2. Emergency light - Wikipedia

    en.wikipedia.org/wiki/Emergency_light

    Every model, therefore, requires some sort of a battery or generator system that could provide electricity to the lights during a blackout. The earliest models were incandescent light bulbs which could dimly light an area during a blackout and perhaps provide enough light to solve the power problem or evacuate the building. It was quickly ...

  3. These Are the Best Emergency Radios to Keep You Updated ...

    www.aol.com/best-emergency-radios-keep-updated...

    This is the most advanced model from Kaito’s Voyager line, and can be used as a daily radio as well as an emergency backup. Power options include an AC adapter, a rechargeable battery, AAA ...

  4. Backup battery - Wikipedia

    en.wikipedia.org/wiki/Backup_battery

    A backup battery provides power to a system when the primary source of power is unavailable. Backup batteries range from small single cells to retain clock time and date in computers, up to large battery room facilities that power uninterruptible power supply systems for large data centers. Small backup batteries may be primary cells ...

  5. Electric battery - Wikipedia

    en.wikipedia.org/wiki/Electric_battery

    An electric battery is a source of electric power consisting of one or more electrochemical cells with external connections [1] for powering electrical devices. When a battery is supplying power, its positive terminal is the cathode and its negative terminal is the anode. [2] The terminal marked negative is the source of electrons.

  6. Eve Systems - Wikipedia

    en.wikipedia.org/wiki/Eve_Systems

    Elgato also developed light bulbs that can respond to programming on a mobile device and respond to commands over Bluetooth. In May 2018, Elgato introduced Eve Aqua, a smart water controller. [11] [12] In late 2014, Elgato introduced the Smart Power battery backup for mobile devices.

  7. 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 ...