Craftsman C3 19.2 volt Cordless Inflator —
I have had this handy little item now for over a year and have used it ALOT. You can add 10psi to 4 tires on a fully charged battery before it's drained, plenty to keep a normal vehicle at the proper inflation. I've not used it on a flat tire (just deflated), but I can imagine that you can air that puppy up too! Best purchase I've made for my shop in years.