I've got GoogleSync (push Gmail) set-up and my battery is draining to almost empty by dinner time, even on days when I don't use my iPhone much. My usage time shows 4+ hours, which makes me wonder whether push Gmail is the culprit. I've heard that others have had similar issues but I haven't been able to find a solution. One sure thought that maybe when he started to add contacts sync to his configuration that led to his battery drain. Any thoughts/fixes besides just reverting to IMAP?