There are both impact drivers and impact wrenches that are battery powered. I have this battery powered impact wrench https://www.milwaukeetool.com/Products/2555P-20. One battery is sufficient to do a 5 tire rotation on my truck, so should be plenty for a car.

If your outfitting a friend/someone with a car put the cheater bar in the spare tire well. They can be used for more than just a cheater bar.