re: I guess I'll save my $$, then.
The Motomaster Eliminator is the "Gucci model" power cell for jump starting your car out in the boonies. It's got a 120V outlet for powering household appliances, a built-in 250 psi air compressor for flat tires, and 400 Amps for cranking your engine! 'Course it'll cost ya.
I picked up a wimpy version for $30 bucks. Seems to work just as well. And I use it to jump start my model airplane engines too on weekend fun fly's.