As the sucker who required the built-in air compressor of Lvnmarks' DeWalt Jump box, I can wholeheartedly reccomend the device. It's physically larger than the little "phone charger" one above, but I sure was glad Eric had it.
This professional-grade jump starter features a 1400 peak amp jumpstarter, 120 PSI air compressor, dual 3.1 amp USB ports, and a ultrabright LED area light all packaged in a compact portable housing.
www.dewalt.com
In other news, don't follow your buddy through a construction zone when your camper is running 12 year old, worn out, bias ply tires. I mean, I still blame myself, but it's a good life lesson.