thunder312--I don't know why, but i've had the same experience. I've also had the experience of the battery in my 505 being discharged when connected to my computer--after I'd "ejected" it by clicking on the eject button in the Sony software, but not actually unplugging the reader. It was charging up until I clicked the "eject" button--the red light was on. After I clicked the "eject" button the red light went out. I didn't unplug it for a couple hours and when I did, the reader gave me a low battery warning.
dordale