Cheap lipo idea?

Hey, would it work to run these in a car? I'd get employee discount on them so they'd be even cheaper, but don't know if they'd handle the bursts. The package said they're rated to 20C, and two of those in parallel for about 6400mAh would be nuts. I notice the cells don't have taps, or whatever it's called that you use to individually measure voltage and stuff, and assume there'd be a way to solder those in. MetalMan, if you wanted some, I could swing my discount and then just send them to you. :D