How is the battery life on the skyrocket?

In Boston for a conference this week...nice city, BTW. LTE speeds are pretty impressive up and down, at 21754 and 13960 respectively.

Sent from my Samsung Galaxy SII Skyrocket using Tapatalk 2
 
I've had it for a long while now and I must say that I am getting about 8-9 hours of heavy use out of it on hspa+. When I'm on LTE on heavy use I get maybe 4 hours out of it. This is weird on days when I barely use it my battery runs down in about 10-11 hours. Crazy right but I'm sure thats due to all of the constant updates I have running in the background. A side note I've had the phone since it came out and its been acting weird it powers down on its own and then cycles and vibrates. I had to pull the battery to get it going again. Then I had to factory reset. It's working okay now but I'm starting to think it might be my power button malfunctioning.