Originally Posted by RoninTech
Do these e-ink screens use the same amount of power to change a single digit on them (tiny %) vs. a page turn (large %)?
Probably not (and updating the screen would only need to happen once per minute), but you could run into ghosting/legibility issues fairly quickly . The other part of the power use equation is that it would have to keep the processor live in a more highly powered up state to know when it needed to change the time. I believe Kobo talked about these points waaayyyyy back when at one point.