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These are also sometimes known as B batteries, but are very distinct from actual B cell batteries. 30-volt: Eveready 413: 20F20 (Zn/MnO 2) 210: 140: 30 V (20 cells) Flat round (one each end) H: 64 L: 25 W: 15 Used in older instruments. [248] These were sometimes sold as B batteries for hearing aids and small radios. 45-volt: Eveready 415: 30F20 ...
An AA size dry cell has a capacity of about 2,000 to 3,000 milliampere-hours. An average smartphone battery usually has between 2,500 and 4,000 milliampere-hours of electric capacity. Automotive car batteries vary in capacity but a large automobile propelled by an internal combustion engine would have about a 50-ampere-hour battery capacity.
Cell chemistry Also known as Electrode Rechargeable Commercialized Voltage Energy density Specific power Cost † Discharge efficiency Self-discharge rate
Capacity is usually stated in ampere-hours (A·h) (mAh for small batteries). The rated capacity of a battery is usually expressed as the product of 20 hours multiplied by the current that a new battery can consistently supply for 20 hours at 20 °C (68 °F), while remaining above a specified terminal voltage per cell.
In practical use, charging speed is more relevant than battery capacity (see rechaging section). Typical EV batteries in passenger cars have a weight of 300 to 1,000 kg (660 to 2,200 lb) [73] resulting in ranges from 150 to 500 km (90 to 310 miles), depending on temperature, driving style and car type.
This is an extended version of the energy density table from the main ... battery, Nickel–metal hydride (NiMH), low power design as used in consumer batteries [29] 0.4:
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The sum of the molecular masses of the reactants is 642.6 g/mole, so theoretically a cell can produce two faradays of charge (192,971 coulombs) from 642.6 g of reactants, or 83.4 ampere-hours per kilogram for a 2-volt cell (or 13.9 ampere-hours per kilogram for a 12-volt battery). This comes to 167 watt-hours per kilogram of reactants, but in ...