Originally Posted by thibaulthalpern
So with my experiment last night, the battery drain didn't happen. The SD card remained in the card slot while I read for about 30 minutes last night. When I woke up some 6 hours later, the battery level was fine.
I think your testing time is too short. I noticed quite a significant difference with PRS 505. If PRS 505 is in sleep mode with SD card, the battery will be drained in 2 weeks even if I don't use it at all. Without SD card, it lasts more than 3 weeks under the same condition.