I have a really old Sear's 12V air compressor. I bought it for my Dad back in the 80's and he said he wanted a 120V model. I took it and got him a 120V B&D air pump. That Sears is in the trunk of my car and I use it occasionally when I get a low tire while on the road.
I bought a HF 12V compressor for one of the kids cars - it's small and it pumps air as designed.
Jim