I have the extended battery, and have a docking station at work. I play Pandora most of the day at work, so I just charge it there. I left work at noon on Friday, and used it pretty heavily Friday afternoon, Friday evening and Saturday. During that time, I played games, texted, made phone calls and surfed the web. Oh, and I have an app called "screen on" and forgot to deactivate that...so the screen was on quite a bit. Finally had to charge it on Saturday evening, when the battery indicator was into the orange when I went to bed.
I'm pleased with the extended battery life!