watt-hour

noun

ˈwät-ˈau̇(-ə)r 

: 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

After accounting for major battery components rather than considering the electrode alone, researchers estimate the approach could achieve a stack-level specific energy of 477 watt-hours per kilogram. — Atharva Gosavi, Interesting Engineering, 25 Sep. 2026

Last year, global data centers used 448 trillion watt-hours of electricity, more than all but 10 countries of the world, and it is expected to more than double in the next four years, according to a new report from the United Nations University. — ABC News, 24 June 2026

The Helios Horizon's previous lithium-ion pack delivered 260 Wh/kg (watt-hours per kilogram, a measure of how much energy a battery holds relative to its weight). — Omar Kardoudi june 12, New Atlas, 12 June 2026

The 71-watt-hour battery supports fast charging, and Acer rates it for up to 30 hours of video playback (specifically on the P6’s IPS panel configuration). — John Burek, PC Magazine, 29 May 2026

Word History

First Known Use

1888, in the meaning defined above

Rhymes for watt-hour

• bower
• cower
• dour
• flour
• flower
• fower
• glower
• hour
• our
• power
• scour
• shower