Let me preface this by saying I've had no battery problems. I can usually get through the workday fine, even on 4g. The past few days, something changed. This morning, my phone has been unplugged for 10 minutes, and is down to 80%. Yesterday it dropped to 30% in 3 hours, with only 20 minutes of screen time. I tired swapping batteries, I'm using a different one today than yesterday. Any ideas? I downloaded better battery stats, but it doesn't seem to be showing anything out of the ordinary.