• noun a measurement of power with respect to time. One watt-hour is equal to one watt being used for a period of one hour.
  • A unit of energy representing the power delivered at a continuous rate of one watt for an interval of one hour. This is equal to exactly 3.6 × 103 joules. Also spelled watthour. Its abbreviation is Wh, or Whr.
  • abbreviation Wh
  • abbreviation Whr

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