I cannot recommend this enough! I consider it part of my durable medical equipment. 🤣 I bought one more than a year ago, "just in case", and it has been a lifesaver. For those of you who don't have easy access to a second car to jump your dead battery or a gas station on every corner to put air in your tires, this thing will help you wherever you are.
I had one before that only did car batteries, but this new version has a very fast air compressor, a light, and even 3 USB ports. I charged it the day I got it, then the neighbor had it hooked to his riding mower battery for 2 hours last spring before realizing his battery was totally dead. Unfortunately, this is not a miracle worker. I spent all of a minute today putting air in 2 of my mother's tires and it's still 2/3 fully charged from more than a year ago. I should also add that it has a built-in, easy-to-read gauge so that you don't have to check your tires beforehand and can shut it off when it reaches the right pressure.
It weighs a little over 10 pounds, which is the high end of what I can carry these days, but it's incredibly easy to use. Whether you travel a lot or just live alone, you need one of these! For passenger cars or smaller, you only need the 800 amp version that runs around $40. Pickups or bigger vehicles will need a larger size that costs around $100.