I haven't changed a thing about my phone or settings, but all of a sudden, the battery is draining like a motherfucker. It's died in the middle of the night the last two nights (which blows because I use it for my alarm). I had it plugged in all day and I pulled it out maybe 2 hours ago, I haven't touched it, and the battery life is half depleted.

Anyone have any clue what might be causing this? I did just notice that I have a software update. Otherwise I am lost because I didn't change anything. I just got the phone a few months back.