amp-hour

noun

ˈamp-ˈau̇r 

-ˈau̇-ər

variants or amp hour

plural amp-hours or amp hours

: a unit quantity of electricity equal to the quantity carried past any point of a circuit in one hour by a steady current of one ampere : ampere-hour

Specifications include 6.8 amp-hours and 320 watt-hours per kilogram.

—Sara Samora

A larger battery will typically provide higher amp hours, which can help extend your drill's runtime and reduce time spent recharging during a project.

—Alex Rennie

—often used before another noun

At freezing temperatures, a fully charged battery delivers only about two-thirds of its rated amp-hour capacity.

—Ben Clabes

Examples of amp-hour in a Sentence

Recent Examples on the Web

The charge controller is connected to a 35-amp-hour lead-acid battery, a type of rechargeable battery commonly used for energy storage. — Munis Raza, Interesting Engineering, 24 Mar. 2026

In Michigan, Ford's BlueOval Battery Park Michigan in Marshall will produce smaller amp-hour cells for use in residential energy storage solutions. — Jamie L. Lareau, Freep.com, 29 Jan. 2026

The bus now holds 100 gallons of water, 1,800 amp-hours of lithium-ion batteries and 3,300 watts of solar power — enough to run air conditioning, appliances and electronics without ever plugging in. — Jordan Greene, PEOPLE, 29 Dec. 2025

The 106 amp-hour cells feature a solid electrolyte infused with gel or liquid. — IEEE Spectrum, 12 Mar. 2025

Those Continental mud-terrain tires measure 42 inches in diameter, the roof supports 1,400 watts of solar panels (that charge a 1,980 amp-hour lithium-ion battery pack), and 118 gallons of water capacity feed a shower, bathroom, and kitchen. — Michael Van Runkle, Robb Report, 9 Jan. 2025

Batteries Samsung has increased the energy density of the 21700 cells employed in Rivian’s Standard Pack and Max Pack batteries from 50 amp-hours per cell to 53 amp-hours. — Dan Carney, Popular Science, 12 June 2024

Milwaukee claims the pole saw’s 8 Ah (amp-hour) batteries offer more power, allowing the machine to run for longer time periods, but the run times are not listed on the website. — Nor'adila Hepburn, Better Homes & Gardens, 25 Sep. 2023

Word History

First Known Use

1884, in the meaning defined above

Rhymes for amp-hour

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