How much energy is used for my iPhone to charge?

when i plug my iphone into the wall to charge it, how much energy is passed from the wall to my iphone before its fully charged?? i'm writing a blog entry about solar iphone cases, and i'd like to try and calculate how much energy you'd save or how much carbon you'd offset if you used a solar... show more when i plug my iphone into the wall to charge it, how much energy is passed from the wall to my iphone before its fully charged??

i'm writing a blog entry about solar iphone cases, and i'd like to try and calculate how much energy you'd save or how much carbon you'd offset if you used a solar charger to juice your iphone for a year instead of the walljack.

thanks!
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