watt-hour
noun
: 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
The new rule also sets a size limit of 300 watt-hours per battery, with a grace period for larger batteries until Jan. 11, 2026.
—
Michael Salerno, AZCentral.com, 20 Sep. 2025
The policy also restricts the size of lithium batteries eligible for transportation on Southwest flights, to 300 watt-hours or less.
—Zach Wichter, USA Today, 15 Sep. 2025
Portable power for cold climates According to reports, the Pioneer Na has a 900-watt-hour (Wh) capacity, which is sufficient to power laptops, small appliances, or serve as a backup power source.
—Christopher McFadden, Interesting Engineering, 13 Sep. 2025
The Yoga's 75-watt-hour battery—generous for a 14-inch laptop—and energy-efficient chipset overcame the machine's power-hungry high-resolution OLED display.
—Mark Coppock, PC Magazine, 11 Sep. 2025
It's powered with a 720-watt-hour battery, which Rad Power estimates will get you to over 100 km (65 miles) of range at low assist settings.
—John Timmer, ArsTechnica, 12 Aug. 2025
The energy density, or the amount of energy a battery can store, is measured in watt-hours per kilogram (Wh/kg).
—Stephanie Pearson, Wired News, 8 Aug. 2025
The Power 2000 packs 2,048 watt-hours of juice in a carry-on-sized package.
—Joe Salas
july 04, New Atlas, 4 July 2025
With a pair of 12 lb 500 watt-hour battery packs, the exoskeleton can operate for over 2 hours during normal use.
—IEEE Spectrum, 10 Dec. 2019
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Michael Salerno, AZCentral.com, 20 Sep. 2025
The policy also restricts the size of lithium batteries eligible for transportation on Southwest flights, to 300 watt-hours or less.
—Zach Wichter, USA Today, 15 Sep. 2025
Portable power for cold climates According to reports, the Pioneer Na has a 900-watt-hour (Wh) capacity, which is sufficient to power laptops, small appliances, or serve as a backup power source.
—Christopher McFadden, Interesting Engineering, 13 Sep. 2025
The Yoga's 75-watt-hour battery—generous for a 14-inch laptop—and energy-efficient chipset overcame the machine's power-hungry high-resolution OLED display.
—Mark Coppock, PC Magazine, 11 Sep. 2025
It's powered with a 720-watt-hour battery, which Rad Power estimates will get you to over 100 km (65 miles) of range at low assist settings.
—John Timmer, ArsTechnica, 12 Aug. 2025
The energy density, or the amount of energy a battery can store, is measured in watt-hours per kilogram (Wh/kg).
—Stephanie Pearson, Wired News, 8 Aug. 2025
The Power 2000 packs 2,048 watt-hours of juice in a carry-on-sized package.
—Joe Salas
july 04, New Atlas, 4 July 2025
With a pair of 12 lb 500 watt-hour battery packs, the exoskeleton can operate for over 2 hours during normal use.
—IEEE Spectrum, 10 Dec. 2019
Cite this Entry
“Watt-hour.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/watt-hour. Accessed 26 Sep. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share