I am not sure how many days I am getting from my 4S. I would say quite a few. Because of server changes, I have yet to add my email addresses to my new iPhone. Do those of you who are having the problem get lots of email?
You get multiple days? I get about one and that's with location services turned off all the way, no e-mails set up, no skype and whatnot running in the background, screen locking after a minute.