My personal opinion is that battery life on an eReader will see no impact from the SD card. eBooks are small and transfer rates, even on slow cards, are fast enough that you can transfer a book to memory in a blink. Once in memory, there is no need for the eReader to access the card again, so it should stay dormant. Even on large eBooks, there should be enough memory to hold a significant number of pages in memory to minimize access to the SD card. Bottom line, I think there's no need to worry about battery life and SD cards.
|