The annual cost to charge an iPad is just $1.36, according to the Electric Power Research Institute, a non-profit research and development group funded by electric utilities. By comparison, a 60-watt compact fluorescent bulb costs $1.61, a desktop PC adds up to $28.21 and a refrigerator runs you $65.72.
But there’s an even cheaper way to go than the iPad. EPRI calculated the cost of power needed to fuel an iPhone 4 for year: just 38 cents.
iPad一年电费花费 1.36美元，一台桌面电脑28美元，一台冰箱是65.72美元，而iPhone 4只需要38美分。
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If The New York Times had run this story, the headline would have been, “iPads Cost Four Times More to Charge Than iPhones”.