Insider Picks writes about products and services to help you navigate when shopping online. Insider Inc. receives a commission from our affiliate partners when you buy through our links, but our reporting and recommendations are always independent and objective. Car tires have a way of leaking at the most inconvenient times, usually when you’re nowhere near a gas station. I first purchased a portable air compressor for my car when I moved to a rural town, where the nearest gas station was a half-hour away. I’ve since relied on the compressor to top off the tires on my car, lawnmower, and trailer, as well as to inflate an air mattress. The compressor lives in my vehicle so it’s always there in case I need it. Whether you work on vehicles at home or need to maintain air pressure in your own car or lawn equipment, these portable air compressors are affordable and offer unbeatable convenience. Most of them are powered via a vehicle’s power outlet (12V cigarette lighter socket). Outside of the car, with adapters, you can use them to inflate many different objects, from air mattresses and sports balls to pool floats and more. Many of these air compressors can a...