sd card chewing up battery?

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http://forum.xda-developers.com – this is the first time I've ever noticed this on the battery usage. its showing sd card in 2nd spot. i mean i always thought it would show the app that would be accessing the sd card such as gallery for battery usage. could someone explain what exactly is measuring/tracking to come up with sd card battery usage? thanks Attachment 1310274 Attached Thumbnails   (HowTos)