Default [Q] SGH-i757 Battery Life

I just got the Samsung Galaxy S II HD LTE from Bell and I was wondering how much battery life I should expect to get.
I unplugged my phone at 6AM today, and by 5:30PM I already had no charge. (no apps running, Wi-Fi off, Bluetooth off, GPS off, LTE DATA was on though and so was SYNC. Could that be what drained it so fast?
I used the phone maybe for a total of 30 minutes throughout the day just for browsing reddit and email. Otherwise it was in my pocket.