As the title indicates, I seem to be suffering from a battery drain on my 3GS not unlike this poster. There are a few things may be different (they may not be, I didn't see them come up), or at the very least are likely relevant: My phone did not feel warm when it was draining I rebooted my phone, and that did nothing to stem the tide No new apps have been added for about a week This suddenly started today, everything was normal yesterday I seem to have the worst drain I've ever seen posted on MR (that hour was checking email, looking at three text heavy websites, rebooting the phone, setting call forwarding, and watching battery remaining percentage drop like a penny off of the Empire State Building) - heck, 50% of that drain happened while the no-GPS-no-WiFi-Edge-only phone was on standby for 90 minutes I have an appointment with the Genius Bar on Friday, so I have tonight and tomorrow night to tinker a little bit, but it is irritating to see my phone die before 9 am. For now, they want me to try restoring the phone to new before I come in. I have seen different suggestions, all of which seem to revolve around restoring the iPhone. I'm not sure how the batter drain is a software issue, but, that's no big deal. My bigger concern is, and this is only because I haven't had to do this before - is there any benefit to restoring as new versus restoring to a backup? I mean, I understand that if I had made a change to an app or something, that there might have been some correlation, but I can't figure out what could have happened during the charge process that would affect something in the software. I suppose it will just mean an hour or so of updating all my settings if I go back to new, rather than the backup, so it really isn't that big a deal. But, still.