We learned via Apartment Therapy that the Electric Power Research Institute has determined that your iPad uses 12 kWh of electricity over the course of a year at a cost of $1.36.
Here's the breakdown on the annual cost of other gadgets they looked at:
iPhone 3G -- $0.25
laptop -- $8.31
60W compact fluorescent light bulbs -- $1.61
42" plasma TV -- $40.57
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