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A kilowatt-hour (kWh) is a measure of the quantity of vitality a tool must run for one hour, generally used because the billing unit for residential or industrial electrical service. For instance, ten 100-watt lightbulbs left on for one hour would use one Kilowatt-hour of electrical energy. Electrical autos additionally measure their battery capability by the variety of Kilowatt-hours the batteries can maintain. See additionally kilowatt, watt.
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