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  2. Jump start (vehicle) - Wikipedia

    en.wikipedia.org/wiki/Jump_start_(vehicle)

    Heavy vehicles such as large trucks, excavation equipment, or vehicles with diesel engines may use 24-volt electrical systems. Trucks usually have a 24 V supply using two 12 V automotive batteries in series: it is therefore possible to jump-start a vehicle with a 12 V electrical system using only one of the two batteries. [11]

  3. Automotive battery - Wikipedia

    en.wikipedia.org/wiki/Automotive_battery

    A typical 12 V, 40 Ah lead-acid car battery. An automotive battery, or car battery, is a rechargeable battery that is used to start a motor vehicle. Its main purpose is to provide an electric current to the electric-powered starting motor, which in turn starts the chemically-powered internal combustion engine that actually propels the vehicle.

  4. Superpower steam - Wikipedia

    en.wikipedia.org/wiki/Superpower_steam

    The wheel arrangements introduced in the 1920s for these locomotives were the 4-6-4s, 2-8-4s, 4-8-4s and 2-10-4s; and in the 1930s, the 2-6-6-4s. The term "superpower" was later often applied to all locomotives with 4-wheel trailing truck arrangements, though many did not have boosters and almost all steam of any wheel arrangement built after ...

  5. Booster engine - Wikipedia

    en.wikipedia.org/wiki/Booster_engine

    A locomotive booster for steam locomotives is a small supplementary two-cylinder steam engine back-gear-connected to the trailing truck axle on the locomotive or one of the trucks on the tender. It was invented in 1918 by Howard L. Ingersoll, assistant to the president of the New York Central Railroad .

  6. Lead–acid battery - Wikipedia

    en.wikipedia.org/wiki/Lead–acid_battery

    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).

  7. Regenerative braking - Wikipedia

    en.wikipedia.org/wiki/Regenerative_braking

    Regenerative and friction braking must both be used, creating the need to control them to produce the required total braking. The GM EV-1 was the first commercial car to do this. In 1997 and 1998, engineers Abraham Farag and Loren Majersik were issued two patents for this brake-by-wire technology. [3] [4]