In this video, the Irex CEO says the battery life is 'days', but then mentions "6000 pages in a row". Now we have a hard number to test against.
http://video.foxbusiness.com/9945964...62a05c8ec92b22
So far, it looks like if the wireless is on/active, the blue light stays on. The green light acts as a busy indicator and in the above video, you can see it briefly flash as pages are turned. I guess this is better than an indicator on the screen, which may slow things down even more, and keeps impatient people from triple-clicking / pressing harder their devices to death.