How to Use watt-hour in a Sentence

watt-hour

noun

• Donut Lab claims its battery delivers 400 watt-hours per kilogram.
  — Sujita Sinha, Interesting Engineering, 23 Feb. 2026
• This is good for a modern lithium-ion battery, but far below the company’s claimed 400 watt-hours per kilogram.
  — Sujita Sinha, Interesting Engineering, 9 June 2026
• Producing one liter required about 48 watt-hours of electricity.
  — Atharva Gosavi, Interesting Engineering, 4 Sep. 2026
• The Airbus battery cells provide 200 watt-hours of energy per kilogram.
  — IEEE Spectrum, 24 May 2016
• 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
• By comparison, most lithium-ion batteries today range from 200 to 300 watt-hours per kilogram.
  — Sujita Sinha, Interesting Engineering, 23 Feb. 2026
• At 500 Wh/kg (about 227 Wh/lb), the new cell can store 500 watt-hours for every kilogram of battery weight.
  — Aamir Khollam, Interesting Engineering, 2 Sep. 2026
• In the study, the team created lithium metal pouch cells that achieved an energy density of 317 watt-hours per pound (Wh/lb) at room temperature.
  — New Atlas, 7 Apr. 2026
• Beginning May 1, Delta customers will be limited to two portable chargers, not to exceed 100 watt-hours each.
  — Kelly McCarthy, ABC News, 27 Apr. 2026
• But there’s a difference of nearly four orders of magnitude between the roughly 14 watt-hours of a typical smartphone battery and that of a large EV.
  — IEEE Spectrum, 30 Dec. 2025
• Southwest says spare batteries and power banks must be carried onboard, with terminals protected against short circuits and capacity capped at 100 watt-hours.
  — Aidin Vaziri, San Francisco Chronicle, 8 Apr. 2026
• Starting April 20, the airline is limiting power banks to just one per passenger, and their capacity must not exceed 100 watt-hours.
  — Jibin Joseph, PC Magazine, 13 Apr. 2026
• That figure assumes the vehicle consumes 100 watt-hours per mile and its solar panels deliver at least four kWh of usable energy to the battery during the day.
  — Georgina Jedikovska, Interesting Engineering, 28 Aug. 2026
• 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
• Last year, global data centers used 448 trillion watt-hours of electricity, more than all but 10 countries of the world, said the report issued Wednesday.
  — ABC News, 3 June 2026
• 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
• 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 largest pack, however, will provide that 1,600 km (1,000 miles) of range, equating to energy usage of less than 100 watt-hours per mile.
  — IEEE Spectrum, 28 Aug. 2019
• The prismatic cell design delivers an energy density of about 170 watt-hours per kilogram, according to internal testing.
  — Bojan Stojkovski, Interesting Engineering, 21 Mar. 2026
• Based on the data, investigators estimated the battery’s energy density at about 298 watt-hours per kilogram.
  — Sujita Sinha, Interesting Engineering, 9 June 2026
• In comparison, radioactive batteries generate only about 2 watt-hours per kilogram, which the Rads to Watts Program aims to address.
  — Ameya Paleja, Interesting Engineering, 9 Apr. 2026
• Lithium-ion batteries, which are used everywhere from wearables to grid-level storage facilities, have high energy densities, storing up to 300 watt-hours (Wh) per kilogram.
  — Ameya Paleja, Interesting Engineering, 9 Apr. 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
• Modern lithium iron phosphate (LFP) batteries commonly exceed 200 watt-hours per kilogram, while nickel-rich lithium chemistries can achieve even higher values.
  — Kaif Shaikh, Interesting Engineering, 2 Aug. 2026
• 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
• Sun pointed out that the resulting batteries demonstrated a potential energy density exceeding 500 watt-hours per kilogram at the cell level, a power level that could enable electric vehicles to achieve a much longer driving range per charge.
  — Prabhat Ranjan Mishra, Interesting Engineering, 30 Oct. 2025
• Of LuSEE-Night’s launch mass of 108 kg, about 38 kg is a lithium-ion battery pack with a capacity of 7,160 watt-hours, mostly to generate heat.
  — IEEE Spectrum, 20 Jan. 2026
• Standard packs offer roughly 538 watt-hours for up to 112 kilometers (70 miles) of range, while larger 808 Wh packs extend that to 160 km (100 miles).
  — IEEE Spectrum, 18 Nov. 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 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