Originally Posted by LDBoblo
Probably should be said that Pixel Qi is not promoted as an ultra-low-power solution. It's a slightly different kind of beast that takes quite a bit more power than most e-paper display options. It will certainly be a battery saver relative to the full-backlight option, and it will be very versatile kind of medium for multiple functions in different lighting conditions, but it's not really meant to be clustered in with ultra-low power reflective e-papers.
True, Mary Lou Jepsen says
it will save 80 per cent of the consumption with the back light off which I guess should be enough for someone to read all day long, from dawn till dusk. Most people don't really need anything more than that, you can let it recharge while you' re asleep.