Originally Posted by
SafariMatt
I've often wondered about Kindles. Most of the time, I just flick the switch on mine which puts it into a standby mode where it displays a picture of some old author - does that use some juice? You can hold the power switch to turn it all the way off, but I'd be surprised if people really do that because Kindles take a surprisingly long time to boot.
I don't think that uses power. At least not according to the marketing materials. Supposedly it does not cost any battery power to maintain the image on the screen, since the ink particles stick magnetically and don't require continuous current. If so, then I think it counts as "completely off" since it's not using any power or doing anything, and clearing the screen doesn't actually make a difference.