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2. List of battery sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_battery_sizes

   22.5-volt: Eveready 412: 15F20 (Zn/MnO 2) 215: 140: 22.5 V (15 cells) Flat round (one each end) H: 50 L: 25 W: 15 Used in older instruments. [246] the Regency TR-1 (first transistor radio), [247] and old battery–capacitor flashes. These are also sometimes known as B batteries, but are very distinct from actual B cell batteries. 30-volt ...

3. Battery charger - Wikipedia

   en.wikipedia.org/wiki/Battery_charger

   A battery charger, recharger, or simply charger, [1] [2] is a device that stores energy in an electric battery by running current through it. The charging protocol—how much voltage , amperes, current, for how long and what to do when charging is complete—depends on the size and type of the battery being charged.

4. Battery nomenclature - Wikipedia

   en.wikipedia.org/wiki/Battery_nomenclature

   20: A single zinc-carbon cell, "size 20" which is equivalent to D, or ANSI "13" size 4R25X: 4: R: 25: X: A zinc-carbon lantern battery, consisting of 4 round "size 25" cells in series. Terminated with spring terminals. 4LR25-2: 4: L: R: 25: 2: An alkaline lantern battery, consisting of 2 parallel strings of 4 round "size 25" cells in series ...

5. Comparison of commercial battery types - Wikipedia

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

   3–20 [2] Zinc–carbon: Carbon–zinc ... Rechargeable alkaline: 5–100 [14] ... As thermal runaway is determined not only by cell chemistry but also cell size ...

6. Electric battery - Wikipedia

   en.wikipedia.org/wiki/Electric_battery

   Rechargeable batteries are (re)charged by applying electric current, which reverses the chemical reactions that occur during discharge/use. Devices to supply the appropriate current are called chargers. The oldest form of rechargeable battery is the lead–acid battery, which are widely used in automotive and boating applications.

7. Battery pack - Wikipedia

   en.wikipedia.org/wiki/Battery_pack

   Battery cases also exist in the form of a camera grip accessory, as was for the Nokia Lumia 1020. [20] For mobile phones with removable rear cover, extended batteries exist. These are larger internal batteries attached with a dedicated, more spacious rear cover replacing the default one.