Just a little hint guys, an iPad charger is a 10W charger (Stock charger is a 5W) and will charge a iPhone4 or 4S in about an hour from 1% to full. The ipad charger is compatible with the 4 and 4S, see link below. $30 from Apple.
I already own an iPad so this is what I use. I don't use the long ass cord though, the the square part of the charger has fold out plug that goes right in an outlet.
http://store.apple.com/us/product/MC359LL/A?fnode=MTc0MjU4NjA