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I have to agree with murraypaul. I use SD cards exclusively and don't even keep the Sony memory stick in the reader. I have all of my books broken down by Author and by SD card and if there is a drain on my battery life it is insignificant. After all how hard is it to put it on a charge when it gets a couple of bars down. I have an external charge and the cost was insignificant. My cards when exchanged index in seconds and I can go about my merry way. Also by using the cards I do a direct install on them and bypass the cranky Sony software used for syncing. After several months of pretty much daily use I have no major issues with how I handle my reader and books.
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