At the moment the dr does not stop consuming power when a page is displayed on the screen. But the technology allows a page to be displayed continuously after it is drawn on the screen. For example when battery dies sometimes, the image on the screen stays there. A future update (1.5) to firmware is promised, which will use standby between page flips. I guess this can take total usage up to 12 hours or beyond. This is the situation for now. Check this forum, and you'll see that the issue has been discussed.
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