Milwaukee M18 18-Volt Lithium-Ion Cordless Inflator with Two 5.0ah Batteries $199.00 at Home Depot
Compatible With All M18 Power Tools, Includes Two Batteries, and Charger, Fastest 18V Cordless Tire Inflator
Normally would be 500, down to 200, cheapest I have ever seen. Works with all M18 batteries, comes with 2 5.0ah Batteries.