I am currently on my second 4s because I am one of the unlucky ones that wake up to a 92% charged phone. Well now this one is doing it too! And to top it off when I did my exchange I purchased one for my wife and hers is doing it too! Has anyone that has had this issue actually got an exchange that fixed their problem? I don't know if I should wait a week and do another exchange to see if I get lucky or if I am just fighting a loss cause!