Quote:
Originally Posted by GeoffR
One difference seems to be that when thumbnails and other images are generated for the first time for a book stored on the internal card, a copy of the image is saved, and so the next time it only has to be reloaded from the card. But that doesn't happen for books on the external card, and so their images are generated anew each time they are needed. This takes extra CPU time, so it must also take extra energy.
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Oh, it definitely takes more battery power. If you read a lot of sideloads, you really do want to turn off cover display while sleeping/powered down. :/ Small price to pay, though, for not having to manually reload your library every time you need to factory reset...