Hey I'm on ios7 beta 6 and im still having battery problems. My phone will turn off at 80% and then the drained battery sign will come up. If i wait a couple minutes it will go back to normal. After a couple minutes it will shut off and go back to the drained battery screen. If i plug it in the charger, it will go back to being normal for a while and then it goes back to the normal problem. Does anyone know of anything that can help. I have been suffering with this problem for the last couple days