Here's my story. Before the Portico update my battery life was ok. It can last about 14-16 hours everyday, with WIFI on, Data off and about 2-4 hours of email checking/web surfing. In the most recent week I am also seeing very fast battery drain with similar usage. There was one time I left the phone in standby at 38% battery and three hours later the phone is off. I'm not sure what happened so I am doing some tests.
I first uninstalled metrotube, gmap, gas buddy and some other apps. But I am still seeing fast battery drains. So here's what I have done afterwards
1. charged the phone full on wireless charger, by the time i went to sleep (1019pm) it was at 100%, and estimated time remaining is 17hours. I turned off wireless and wen to sleep
2. the next morning (802am) I checked the phone again it was still at 100% and 17 hours remaining
3. I turned on wifi and used the phone to check some social feeds and emails, by 815am (13min) the battery was at 98%, though the estimated time remaining becomes 20days 7hours
4. I left WIFI on, but disable all background tasks, and left my phone at standby. by 922am it was 96%, and by 119pm it was 95%, pretty decent.
5. Played with it for about half and hour with WIFI on, at 148pm it was 93%
6. I enabled CNN and Weather Channel in the background tasks and left it in standby. I didn't select the WIFI always on option. The battery becomes 32% at 649pm. I disabled the background tasks but kept WIFI on, battery dropped to 7% at about 10pm. And I started recharging.
7. This morning I went out at 630am, turned off the wifi and the phone was still at 100% at noon. As I look for the screenshots on battery levels, the battery dropped to 99% just now.
I am going to open just weather channel in the background right now and see how it goes. I had the location service for those two apps turned on during that 5 hour 93-32% battery slump yesterday, this time i'll turn off the location and see.