Hows it going? I too have a T/A. I love it. I am looking at the same problem here. I would like to run my carputer off a batter charger. I have the M2ATX. Did you say you were going through USB devices as if you were tearing them up by using a battery charger?
I think i'm going to try to hook up to my battery charger tonight to play with settings.
I am trying to get my wireless network at home to work in my car while its in the drive way or gargae. I recently moved my wireless router and still nothing. I need some more time while working on this, so I need a power supply from the house. Your response will be greatly appreciated.