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 v220.127.116.119-took a dive into oil...
8520 v18.104.22.1681-in the box
8100 - 22.214.171.124-out of retirement? lol