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  2. List of battery sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_battery_sizes

    A Battery: Eveready 742: 1.5 V: Metal tabs H: 101.6 L: 63.5 W: 63.5 Used to provide power to the filament of a vacuum tube. B Battery: Eveready 762-S: 45 V: Threa­ded posts H: 146 L: 104.8 W: 63.5 Used to supply plate voltage in vintage vacuum tube equipment. Origin of the term B+ for plate voltage power supplies.

  3. Comparison of commercial battery types - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_commercial...

    50–100 [62] (500@40%DoD [2] [62]) Rechargeable alkaline: 5–100 [14] Nickel–zinc: 100 to 50% capacity [14] Nickel–iron: 65–80 5,000 Nickel–cadmium: 70–90 500 [26] Nickel–hydrogen: 85 20,000 [32] Nickel–metal hydride: 66 300–800 [14] Low self-discharge nickel–metal hydride battery: 500–1,500 [14] Lithium cobalt oxide: 90 ...

  4. Headlamp (outdoor) - Wikipedia

    en.wikipedia.org/wiki/Headlamp_(outdoor)

    Headlamp attached to a helmet. A headlamp, headlight, or head torch is a light source affixed to the head typically for outdoor activities at night or in dark conditions such as caving, orienteering, hiking, skiing, backpacking, camping, mountaineering or mountain biking.

  5. Rechargeable battery - Wikipedia

    en.wikipedia.org/wiki/Rechargeable_battery

    A rechargeable battery, storage battery, or secondary cell (formally a type of energy accumulator), is a type of electrical battery which can be charged, discharged into a load, and recharged many times, as opposed to a disposable or primary battery, which is supplied fully charged and discarded after use.

  6. 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.

  7. Alkaline battery - Wikipedia

    en.wikipedia.org/wiki/Alkaline_battery

    An AA-sized alkaline battery might have an effective capacity of 3000 mAh at low drain, but at a load of 1 ampere, which is common for digital cameras, the capacity could be as little as 700 mAh. [12] The voltage of the battery declines steadily during use, so the total usable capacity depends on the cutoff voltage of the application.

  8. Lithium-ion battery - Wikipedia

    en.wikipedia.org/wiki/Lithium-ion_battery

    A lithium-ion or Li-ion battery is a type of rechargeable battery that uses the reversible intercalation of Li + ions into electronically conducting solids to store energy. In comparison with other commercial rechargeable batteries, Li-ion batteries are characterized by higher specific energy, higher energy density, higher energy efficiency, a longer cycle life, and a longer calendar life.

  9. 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.

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