watt hours
Power times duration
Watt hours measure electrical energy—the amount of power consumed or produced over time.
One watt hour equals one watt of power sustained for one hour.
The unit appears most often in discussions of battery capacity and electricity consumption: The laptop battery holds 50 watt hours.
Kilowatt hours, a thousand times larger, are the standard unit on electric bills.
Also written watt-hours or Wh.
- batteryPortable electricity storage
- battery lifeDevice's charge longevity
- energyPower to do work
- joulesSI energy units
- energy densityStored power per unit
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