So my hubby got me a Kindle for Christmas. Specifically for Business Trips, my company has a site in Sofia Bulgaria and I'll be traveling at least once a quarter.
I am in the hotel room in Bulgaria on my first trip and the battery life is shocking. I was in the airport/airplane for 18+ hours. I was probably reading 3/4 of that time. I haven't even dented the battery indicator.

I did of course have the wireless turned off the whole time and have NO intention of turning it on while I'm here (not sure what might trigger a $2 download fee (I'm subscribed to blogs).
So I'm very impressed! I've had to recharge my iPhone with the external battery once already. Just thought I'd share!