I've been using my edge for over a week now and my battery experience is about the same as reported by Boris (5-6 using everything, about 10 just using e-ink and turning off wi-fi). I have my lcd sleep set at 10 minutes and I haven't had any problems with the screen not coming back on. I have had the problem of triggering the lcd with the edge on my lap and not being able to write on the e-ink side. I think a true sleep mode for the lcd side will resolve all of these problems.