I have had a MyTouch 4g for 3 days now. My battery seems to drain after about 6 hours of normal use (apps, web, phone calls, SMS, etc). Is this normal for MyTouch 4g? for all Android phones? for all smartphones? Just keep plugging in to my computer, car charger, etc? My previous phones (BB Bold 9000, Treo 650) lasted 1-2 days on a charge. Is the iPhone any better?