Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A unit of energy, especially electrical energy, equal to the work done by one watt acting for one hour and equivalent to 3,600 joules.
from The Century Dictionary.
- noun The energy derived from an activity or power of one watt maintained for one hour: a practical unit of energy.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A
unit ofelectrical energy equal to thepower of one watt in use for one hour; often used as a unit ofelectricity consumption
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a unit of energy equal to the power of one watt operating for one hour
Etymologies
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Examples
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For comparison, the iPad 2 has a 25 watt-hour battery; the 11in MacBook Air model has a 35Wh battery, going up to 40Wh in the 13in model.
Apple working on ARM port for Mac OS X: will Macbook Airs see it first? 2012
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In the past 10 years alone, the energy density of lithium-ion batteries has doubled, and the price per watt-hour has fallen by more than 80%.
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It supports Wi-Fi, Bluetooth and aGPS and includes a built-in 25-watt-hour lithium battery.
Tablet Wars 2011
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It is expected that for every square meter of surface, the process could generate about 1 watt-hour per year.
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A BTU, or British thermal unit, is a unit of energy equivalent to about one-third watt-hour of electric power.
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A BTU, or British thermal unit, is a unit of energy equivalent to about one-third watt-hour of electric power.
Test Your Energy IQ 2008
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The watt-hour It is not an SI unit, despite being based on the watt.
Watt-hour 2007
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One watt-hour is the amount of electrical energy equivalent to a one-watt load drawing power for one hour.
Watt-hour 2007
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The watt-hour (symbol W·h) is a unit of energy commonly used to measure electricity.
Watt-hour 2007
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In the inch-pounds unit system, a watt-hour is equivalent to 3.412 Btu.
Watt-hour 2007
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