My battery has actually been solid. I got 13 hours of moderate use yesterday (a little more than moderate) on 4G for about 80% of the time, and at the end I had 15% left.
Today in the morning I got the extended beast battery...if you're having battery issues, get it. This battery is insane. I was on 4G, browsing the internet, email, texting non stop for over 1.5 hours, plus a lot of videos watched streaming. I was trying to drain the battery so I could give it a full charge, and when the battery came it was at 30%. I barely got it down to 15% with phone calls too. The battery just wasn't budging.
4G is great on this phone. Thank God for this battery I don't ever have to toggle between 3G and 4G anymore. Might just delete phone info, not needed anymore.