Battery impact guns

I keep a Milwaukee fuel 1400 ft/lb one behind the seat of my truck.

I ran into some really rusted lug nuts on our camper one time with a flat on the side of the road.
It took forever to change the flat, after that is when I bought the battery powered impact.
I don't use it much, but it is handy.

What I do use a lot is my battery powered circular saw, so much easier to just grab it, than a corded one.