I'm a believer in JumpIts. I bought one with the inflator. I don't remember the
battery amperage at the moment, but it was a larger one, and not one of the cheapest. Anyway, I've never had to use it to jump my vehicle, but I use the inflator all the time. We carry bikes with us, and invariably when you arrive, one or more bike tire is low. Or, the bikes are in the shed at home, and the big compressor is in the workshop on the other side of the property. Or, the lawn tractor has a flat tire. Or, the gas station charges for air. Whatever. Mine gets lots of use. It has the jumper cables, inflator, a 12v socket, and a
light. How about that
light when you are changing a tire in the dark? For $50-75.00, its a deal.