Quote:
Originally Posted by jimr
The simple beauty of e-ink. Basically the unit is off whenever it's not in use. Whether you use the off switch or leave it on the table at the page you were just reading, it's off. The only time it is 'on' and therefore using battery power is when you turn a page, download a book, or make it do something by way of a menu command. The book cover is just it's way of saying you've closed the book for the time being...cool, huh?
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That's not entirely true. What is true is that the screen requires no power to hold an image. There is, however, still a difference between "on" and "off". When it's on, there's software running on it and at least a small "trickle" of power keeping the RAM alive. Some readers (like Sony) have a "standby" mode where the screen goes blank (when you flip the power switch) but the "trickle" is still there - it means your book loads in less than a second when you "turn it on" (vs 35 seconds with Kobo), the downside is that it is (slowly) draining your battery.
But yes, with the Kobo, when you hit the power button and it shows the cover, it is fully off.