Im on my 4th phone, 2 out of the 4 i've had have had great battery life. My first one i bought and the third one had bad battery life.
Im going on 5 months in with this last one with no issues on battery except when the 1308 update happened which killed my battery due to the signal issues. once 1314 came, fixed it all up.
2 Push emails (one work email so a hundred or so emails a day), 1 every 30 minutes
BT on 2 hours of music through BT in my car
Surfing internet probably 2 -3 hours a day
about 50-100 text a day - normal text
not a lot of calls, maybe a couple minutes on average per day
have facebook app, skype, 3 live tiles
on medium brightness no adjustment
LTE zone
no games
Take off my phone off charger at 730am and typically has 10-30% by midnight depending if my GF uses my phone to snoop on my activity.
Very good batter life. If you are not getting good battery life, i'd suggest doing an exchange. If my phone is off the charger overnight while i sleep for 8 hours, the most it goes down is probably 2%, most of the time, the % i have when i go to bed is the % i see when i wake up.