watt-hour

American  

[wot-ou^uhr, -ou-er] / ˈwɒtˌaʊər, -ˌaʊ ər /

Or watthour

noun

1. a unit of energy equal to the energy of one watt operating for one hour, equivalent to 3600 joules. Wh

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watt-hour British  

noun

1. a unit of energy equal to a power of one watt operating for one hour. 1 watt-hour equals 3600 joules

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watt-hour Scientific  

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

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Etymology

Origin of watt-hour

First recorded in 1885–90

Example Sentences

Edison is currently offering 15 cents per watt-hour of storage capacity, which, for a 10-kilowatt-hour battery, translates to $1,500.

From Los Angeles Times • Aug. 20, 2023

For low-income households and homeowners in areas with high fire risk or multiple blackouts, the incentive rises to 85 cents per watt-hour, enough to cover most of the cost of a battery.

From Los Angeles Times • Aug. 7, 2023

Image: Emma Roth / The Verge The filing lists the watt-hour capacity on the iPhone 14 at 12.68Wh when compared to 12.41Wh on the iPhone 13.

From The Verge • Sep. 12, 2022

It looks like the Pro Max’s watt-hour capacity is similar to its iPhone 13 predecessor as well, sitting at 16.68Wh and 16.75Wh, respectively.

From The Verge • Sep. 12, 2022

This may not be taken as an accurate figure, however, as the watt-hour capacity of a cell depends very largely, not only on the make of the cell, but on the rate of its discharge.

From Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. by Miller, Kempster