Awesome, thank you very much, Byrd. I'm thinking...I know that the PB500 series have two power inputs (hence 4 pins) so that they can charge two batteries at the same time. And as luck would have it, I actually have a 16 volt adaptor kicking around that i'm fairly sure puts out the right amount of juice. All I need now is to find the pinouts so I can find out which pin does what... [}] ]'> (yeah, I checked the devnote, which has nothing ) But yeah...I'll try MacTalk...there's maybe two people from around my area on there, but its worth a shot.