Go auto/air85 Notebook Power Adapter with iGo dualpower accessory
. I’ve had great success with this auto/air85’s older brother called the iGo Juice70 Universal Notebook Power Adapter. The main thing is that the older unit weighs 9 ounces, so nearly as much as my 2 pound notebook itself. This one is only 7 ounces and is way cheaper at $80 list vs. $120 list.
I also lost the air adapter, you can get a replacement for $25 from the site. Kind of a ripoff that you pay $25 for a little cable, but otherwise you lose all the capability.