I switch between the 8100 and my new 8520 from time to time, especially if I'm traveling. The 8100 seems to have a much better battery life and is small enough that I can keep it in my pocket comfortably.
9530 v126.96.36.1999-took a dive into oil...
8520 v188.8.131.521-in the box
8100 - 184.108.40.206-out of retirement? lol