Left home at 7:30AM with my iPhone 4 (iOS 4.3.3) fully charged at 100%. I happen to check it at 11:30AM and noticed that the battery level dropped to 86%. The iPhone was in my pocket and was not used during this period. Yes, I always make sure there is no app running in the background, wifi off, Notifications off, etc. Anyone else with similar setup experiencing such excessive battery drain?