# watt-hour

watt-hour a unit of electrical energy or work, equal to one watt acting for one hour, or 3,600 joules

## watt-hour

noun

*Abbr.*

**WH**or

**W-hr**

A unit of energy, especially electrical energy, equal to the work done by one watt acting for one hour and equivalent to 3,600 joules.

## watt-hour

Noun

(*plural* watt-hours)

- A unit of electrical energy equal to the power of one watt in use for one hour; often used as a unit of electricity consumption

## watt-hour - Computer Definition

The power utilization for one hour measured in watts. Abbreviated "Wh," it is widely used to rate how long it takes for a battery to discharge. For smaller batteries, a milliwatt-hour (mWh) rating is used. For example, a 500 mWh battery means it will release 500 watts at a specific voltage for one hour before it is discharged. See ampere-hour and watt.