watt-hour

• “It supports Wi-Fi, Bluetooth and aGPS and includes a built-in 25-watt-hour lithium battery.”

  The Wall Street Journal: Tablet Wars

• “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.”

  The Guardian: Apple working on ARM port for Mac OS X: will Macbook Airs see it first?

• “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%.”

  Matthew Yglesias » Anti-Volt Isn’t Anti-Car

• “It is expected that for every square meter of surface, the process could generate about 1 watt-hour per year.”

  ALTERNATIVE ENERGY: Rain Power | Inhabitat

• “A BTU, or British thermal unit, is a unit of energy equivalent to about one-third watt-hour of electric power.”

  The Wall Street Journal: Test Your Energy IQ

• “In the inch-pounds unit system, a watt-hour is equivalent to 3.412 Btu.”

  Watt-hour

• “The watt-hour It is not an SI unit, despite being based on the watt.”

  Watt-hour

• “One watt-hour is the amount of electrical energy equivalent to a one-watt load drawing power for one hour.”

  Watt-hour

• “The watt-hour (symbol W·h) is a unit of energy commonly used to measure electricity.”

  Watt-hour

• “This may not be taken as an accurate figure, however, as the watt-hour capacity of a cell depends very largely, not only on the make of the cell, but on the rate of its discharge.”

  Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc.

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