Yep, me, too. I was always shutting it down between meetings to conserve the battery. Now don't have to do that. I have a handy app/widget called PowerTime, which is pretty good at measuring battery power in terms of hours. The only hangup is that it bases its calculations on the last hour you used your device. So if you surf the web and download videos for an hour and a half, it will use that profile to calculate how much time you have left. Not so accurate for determing how much time you have left if you do plan to turn off WiFi and read on the e-ink side for the next five hours. But handy none the less.