What should I look for in a Mopar portable air compressor?

When choosing an air compressor, consider the tools you want it to power. Determine which one requires the highest CFM at the highest PSI. Add 50% to the required CFM for a margin of safety, and look for a compressor that meets the requirement.

What is the best battery-powered multi air spring compressor?

Comparing the Best Cordless Air Compressor Models

Intel Air Hawk Pro Automatic Cordless Tire Inflator – Best Cordless Air Compressor Overall. 

Ryobi P737 18-Volt ONE+ Portable Cordless Power Inflator – Most Affordable Battery-Powered Air Compressor.