Every since taking the OTA to 7 (Stock) I have been seeing terrible battery drain. I gave it the week+ to see if it was just because I was using the phone differently...
Standard morning for me is about 6 hours of "use/talking/texting and lots of emailing" just over 1 hour of SOT
Cleared Cache, still seeing android and system taking large amount, not dozing.. terrible 2 days... around 20% left by noon, charged for the afternoon
Reset to Factory and seeing a huge improvement, at 75% at noon
I did a restore from google, so all the same apps just "fresh install"
I'll see how it goes for the rest of the week... but right now, at least I don't feel like I have to carry a charger in my pocket...