http://www.amazon.com/Wagan-300-Amp-.../dp/B00198G4XO
I have one of these "charger, air compressor, worklight, booster cable" things. It sometimes goes in the Model A. However, it is usually used as a place for Momma to plug in her iPhone charger on a long trip. I have not yet used the air compressor part, and my Model A is still on 6 volts, so the jumpstart part won't help either. The worklight part has come in handy though.