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 carbon itself had an energy density of 65 watt-hours per kilogram, also in line with commercial supercapacitors.
—
Perri Thaler, IEEE Spectrum, 22 Oct. 2025
Their simple, powerful design reportedly delivers record-breaking performance, and reaches 178 watt-hours per kilogram (Wh/kg) and 417 watt-hours per liter (Wh/L) in full pouch cells.
—Georgina Jedikovska, Interesting Engineering, 16 Oct. 2025
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
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
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Perri Thaler, IEEE Spectrum, 22 Oct. 2025
Their simple, powerful design reportedly delivers record-breaking performance, and reaches 178 watt-hours per kilogram (Wh/kg) and 417 watt-hours per liter (Wh/L) in full pouch cells.
—Georgina Jedikovska, Interesting Engineering, 16 Oct. 2025
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
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
Cite this Entry
“Watt-hour.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/watt-hour. Accessed 31 Oct. 2025.
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