Quote:
Originally Posted by ApK
On an eink device, absolutely.
Unlike an LCD device, which constantly has to light and update the display, the eink device consumes virtually no power when just displaying a page for you to read (essentially in standby, except for whatever computational tasks are going on in the background, like indexing, etc).
Only when the screen has to change what it is displaying, like when you change pages, or worse, scroll around a website or zoomed-in pdf, does it draw a lot of power.
This is why eink devices are as power efficient as they are, and why page-turns have been an appropriate unit of battery life measurement.
Of course using any other features of the device, like playing audio and using wifi, changes the numbers greatly.
ApK
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They must calculate some average of page turns per hour I guess.