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Batteries glossary

Watt-hour

Also called Wh, kWh, MWh, GWh, kilowatt-hour, megawatt-hour, gigawatt-hour

A unit of energy equal to one watt for one hour, or 3,600 joules. Batteries are sized in watt-hours, kilowatt-hours (kWh), megawatt-hours (MWh) and gigawatt-hours (GWh).

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