Today was a HORRIBLE battery day for me as well. I charged it up to 100% around 9am, unplugged, and it was down to around 25% by 3pm. I did have it on LTE most of the day (but I've done that the last few days, just to see how it worked, and made it through almost the whole day and didn't have to recharge til around 10pm) but it just plummeted.
I got it recharged to around 85% or so before I left work around 6pm, unplugged, and it was down at 20% this afternoon around 8pm.
I've NEVER had a "2 charge day" on this phone, so something's definitely up, hopefully it's just a network problem and not all of our batteries blowing up at the same time.
I saw my email was set to sync every 15 minutes which I don't know what changed that. I do have everything normally set to not really sync, since I'll let it sync when I actually want to see it.
I did notice the phone auto-updated Rhapsody this morning (I don't know why, I have auto-updates off and I never use Rhapsody)... I better go double check some of my "disabled" settings for what may have been turned back on.