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 v18.104.22.1689-took a dive into oil...
8520 v22.214.171.1241-in the box
8100 - 126.96.36.199-out of retirement? lol