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  2. Mechanically powered flashlight - Wikipedia

    en.wikipedia.org/.../Mechanically_powered_flashlight

    The best designs use a supercapacitor instead of a rechargeable battery, since these have a longer working life than a battery. This, along with the long-life light-emitting diode which does not burn out like an incandescent bulb, give the flashlight a long lifetime, making it a useful emergency light. A disadvantage of many current models is ...

  3. Flashlight - Wikipedia

    en.wikipedia.org/wiki/Flashlight

    An LED flashlight has a longer battery life than an incandescent flashlight with comparable output. [10] LEDs are also less fragile than glass lamps. LED lamps have different spectra of light compared to incandescent sources, and are made in several ranges of color temperature and color rendering index. Since the LED has a long life compared to ...

  4. These Craftsman 20V Batteries Are 55% Off on Amazon, So ... - AOL

    www.aol.com/lifestyle/craftsman-20v-batteries-55...

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  5. Charge cycle - Wikipedia

    en.wikipedia.org/wiki/Charge_cycle

    A charge cycle is the process of charging a rechargeable battery and discharging it as required into a load. The term is typically used to specify a battery's expected life, as the number of charge cycles affects life more than the mere passage of time.

  6. Solar-powered flashlight - Wikipedia

    en.wikipedia.org/wiki/Solar-powered_flashlight

    A typical solar flashlight can give useful levels of illumination on objects up to 50 metres away, and beam may be visible for much longer distances. The solar cells used for battery charging have an indefinite life expectancy. A solar powered flashlight may give several hours of light after being charged during the day. [3]

  7. Lantern battery - Wikipedia

    en.wikipedia.org/wiki/Lantern_battery

    Lantern batteries are physically larger and consequently offer higher capacity than the more common flashlight batteries. Lantern batteries comprise multiple cells inside a housing. The most common variant in the US is the 6-volt square-base battery with spring terminals. In Europe the most common one is the 4.5-volt flat pack. [1]

  8. Get a Free Battery With This Craftsman Drill-Driver Kit ... - AOL

    www.aol.com/lifestyle/free-battery-craftsman...

    In addition to the discount, you get a free battery compatible with other Craftsman tools. Get a Free Battery With This Craftsman Drill-Driver Kit, Which is Already 33% Off at Lowe’s Skip to ...

  9. History of the battery - Wikipedia

    en.wikipedia.org/wiki/History_of_the_battery

    Another problem with Volta's batteries was short battery life (an hour's worth at best), which was caused by two phenomena. The first was that the current produced electrolyzed the electrolyte solution, resulting in a film of hydrogen bubbles forming on the copper , which steadily increased the internal resistance of the battery (this effect ...

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