does anyone else's battery go as such - full for a bit, then nothing but the nipple gone for half the day, then suddenly what looks like half left out of no where? no matter how much i use my phone. like i guess i am looking for an "hour-glass" effect here, it should slowly drain until it's empty. i have never seen my battery icon look 3/4 of the way full, it just skips right over that look on my phone.