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  2. Ampere-hour - Wikipedia

    en.wikipedia.org/wiki/Ampere-hour

    4), the perceived energy capacity of a small UPS product that has multiple DC outputs at different voltages but is simply listed with a single ampere-hour rating, e.g., 8800 mAh, would be exaggerated by a factor of 3.75 compared to that of a sealed 12-volt lead-acid battery where the ampere-hour rating, e.g., 7 Ah, is based on the total output ...

  3. Ammeter - Wikipedia

    en.wikipedia.org/wiki/Ammeter

    An integrating current meter calibrated in ampere-hours or charge. There is also a range of devices referred to as integrating ammeters. [6] [7] In these ammeters the current is summed over time, giving as a result the product of current and time; which is proportional to the electrical charge transferred with that current.

  4. Battery charger - Wikipedia

    en.wikipedia.org/wiki/Battery_charger

    A 10-ampere-hour battery could take 15 hours to reach a fully charged state from a fully discharged condition with a 1-ampere charger as it would require roughly 1.5 times the battery's capacity. Public EV charging stations often provide 6 kW (host power of 208 to 240 V AC off a 40-ampere circuit). 6 kW will recharge an EV roughly six times ...

  5. Automotive battery - Wikipedia

    en.wikipedia.org/wiki/Automotive_battery

    Ampere hours (Ah or A·h) is a unit related to the energy storage capacity of the battery. This rating is required by law in Europe. This rating is required by law in Europe. The ampere hour rating is generally defined as the product of (the current a battery can provide for 20 hours at a constant rate, at 80 degrees F (26.6 °C), while the ...

  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. Volt - Wikipedia

    en.wikipedia.org/wiki/Volt

    At that time, the volt was defined as the potential difference [i.e., what is nowadays called the "voltage (difference)"] across a conductor when a current of one ampere dissipates one watt of power. The "international volt" was defined in 1893 as 1 ⁄ 1.434 of the emf of a Clark cell.

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