<< Everything has to be battery powered. Why should they equip planes with 120-volt outlets? That's more weight and money on the plane...not to mention fixing it if it breaks, liabilities if some idiot shocks himself with it, etc, etc. >>
I think you're missing the point. Some planes do have power outlets (but not 120 volt), and he "just got back from circuitcity...[and] purchased a targus air/car adapter" to use with those special outlets. But, Southwest, being a more economical airline, most likely does not have the outlets.