I can't seem to have any good luck lately. Now my battery is completely draining after about 5 hours, and I haven't changed any of my settings. As of last week, I was at about 72% battery life at the end of the day. Now, I can't get 6 hours out of it. Battery app is saying that my screen is using 62% of my battery, and I've made no changes. I always keep my screen at 50% brightness. WTH? ?