: a unit of work or energy equivalent to the power of one watt operating for one hour

Examples of watt-hour in a Sentence

Recent Examples on the Web
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Zhu says Lenovo is targeting between two and 2.5 hours of battery life in demanding heavy games — which lines up with the basic math of dividing a 55 watt-hour battery by 20 watts, assuming the rest of the system doesn’t eat up a lot more. Sean Hollister, The Verge, 7 Jan. 2025 Remarkably, during 2023 Maryland’s entire fossil fuel industry generated 16.7 TWh (trillion watt-hours) of electric power. Alex Pavlak, Baltimore Sun, 6 Jan. 2025 Graphene has a phenomenal capacity, up to 1,000 watt-hours of energy per kilogram. Nadezhda Kosareva, Forbes, 30 Dec. 2024 Google has estimated that each online search takes up 0.3 watt-hours worth of electricity, and the latest estimates on generating images with services like DALL-E peg one image at the same energy requirement as charging up your mobile phone. Alexander Puutio, Forbes, 22 Dec. 2024 That includes specific energy of at least 330 watt-hours per kilogram, a volumetric density of at least 842 watt-hours per liter, and a proven range of up to 1,200 cycles in 4 to 10 ampere-hour cell formats. IEEE Spectrum, 10 Dec. 2024 Consider that a single Google search consumes 0.3 watt-hours of electricity, according to the International Energy Agency, but a similar query on OpenAI takes 2.9 wh. Prarthana Prakash, Fortune, 26 Nov. 2024 For scale, a single Google search uses 0.3 watt-hours of electricity, while a request for OpenAI’s ChatGPT takes 2.9 watt-hours, the agency found. Rocio Fabbro, Quartz, 15 Oct. 2024 For example, Dell is just now announcing a new version of its flagship $1,400 XPS 13 laptop with Lunar Lake that’s basically identical to the current model in every other way: same chassis, same dimensions, same screen, same 55 watt-hour battery pack. Sean Hollister, The Verge, 3 Sep. 2024

Word History

First Known Use

1888, in the meaning defined above

Time Traveler
The first known use of watt-hour was in 1888

Dictionary Entries Near watt-hour

Cite this Entry

“Watt-hour.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/watt-hour. Accessed 22 Jan. 2025.

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