Just a thought...
I saw this infomercial on tv yesterday for these DC power generators that came with dc-ac inverters... They were pretty small, small enough for a trunk... I was wondering what you all would think about using that to give the MP3 player its own power supply.
What kind of generator? Like a gasoline generator? The last thing you would ever want to do is put any kind of gas or propane genarator in you trunk....theres more safaty hazzards than i could ever mention doing that...
It was the kind you had to charge up... Plug into a wall...