So I have turned everything off: GPS, WiFi, Autosync, Brightness all the way down, manual sync on everything. After letting the phone sit for 30 minutes, my battery was already down 10 percent. This is really frustrating. Last night I went to bed at 2am with 90% battery, woke up randomly at 7am and saw that there was less than 15% battery.. I turned my network off and wifi. What's the deal?