I have a 700E and it has a battery that lasts for about 3 hours on a charge. 500E does not?
Yes it does but that's not the question . I have 1 AC adapter that came with the unit which I'd like to leave at work where I often hook up the Pocketdish to a TV to watch shows I've recorded. When I take it home to download more shows, I was hoping it would draw power from the USB connection on my 622 so I wouldn't have to keep taking the AC adapter back and forth .