I've had the combination battery charger tire inflator for years. I just purchased a Viair and love it. No more waiting 10 minutes to fill up a few pounds on a cold day. The other problem was that if I did happen to have to jump a battery, I couldn't use the compressor without charging the unit. The Viair works off my TV battery, or the TT battery if hooked to shore power. It fills tires fast, and, in the case the I ever need to completly fill a flat tire, it will fill it without having to rest. Wish I would have known about this before I bought the combo charger/compressor. In addition, the Viair is quiet so I don't have to feel bad if I need to add pressure in order to leave early in the a.m.
2019 Chevy express 2500 Van Coversion. 2017 Jayco 23MRB: 26' total and Glacier Package. 2 Renogy solar panels. Married 46 years. Haley the mutt, 3 years old. "Excited to learn new things everyday and humbled by those who offer to help."