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  2. Battery terminal - Wikipedia

    en.wikipedia.org/wiki/Battery_terminal

    These mate with metal strips or springs in the battery holder. Six-volt lantern batteries typically feature two coiled, cone-shaped spring terminals, designed to mate with flat contact plates on the inside of the battery compartment. Some lantern batteries instead feature screw terminals, while still others instead feature pin holes. [1]

  3. Battery holder - Wikipedia

    en.wikipedia.org/wiki/Battery_holder

    Battery types such as the 9-volt have snap-on contacts. Battery holders for zinc-air batteries must not be completely air-tight since approximately 1 litre of air is required per ampere-hour of discharge per cell. The battery holder may include a valve integrated with the device power switch to allow air to be admitted when the device is ...

  4. Electric pen - Wikipedia

    en.wikipedia.org/wiki/Electric_pen

    The major drawback to Edison’s electric pen was its wet cell battery, which had to be taken care of and maintained by experienced telegraphists. [ 1 ] [ 4 ] Due to its messy nature, it was important for Edison to incorporate batteries that were more acceptable to clerks who had to take care of the pen and its underlying machinery. [ 1 ]

  5. Jelly roll (battery) - Wikipedia

    en.wikipedia.org/wiki/Jelly_roll_(battery)

    The design has this name because the cross section of the battery looks like a Swiss roll. In this design, an insulating sheet is laid down, then a thin layer of an anode material is laid down, a separator layer is applied, and a cathode material is layered on top. This sandwich is then rolled up and inserted into a hollow cylinder casing.

  6. 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.

  7. Button cell - Wikipedia

    en.wikipedia.org/wiki/Button_cell

    Button, coin, or watch cells. A button cell, watch battery, or coin battery is a small battery made of a single electrochemical cell and shaped as a squat cylinder typically 5 to 25 mm (0.197 to 0.984 in) in diameter and 1 to 6 mm (0.039 to 0.236 in) high – resembling a button.

  8. 15 holiday gifts for dementia patients and caregivers ...

    www.aol.com/15-holiday-gifts-dementia-patients...

    11. A memory phone can store photos with names and contact information. 12. Puzzles and activity books stimulate the brain and promote cognitive sharpness.. 13. Card games and board games ...

  9. Lead–acid battery - Wikipedia

    en.wikipedia.org/wiki/Lead–acid_battery

    The lead–acid battery is a type of rechargeable battery first invented in 1859 by French physicist Gaston Planté. It is the first type of rechargeable battery ever created. Compared to modern rechargeable batteries, lead–acid batteries have relatively low energy density. Despite this, they are able to supply high surge currents.

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