AIRMOTO Tire compressor.

That looks pretty cool! The only thing I don't like about it is it looks like you have to screw the hose onto the valve, which always leads to some loss of pressure when you unscrew it. Of course, in this case you have to have it screwed on because it probably takes several minutes to pump up the tire, I would imagine a bunch longer if it was almost flat.
 
The size is a positive - easy to tuck in the spare tire compartment. I am a bit leery of USB powered stuff though. I also note that the fill hose is of a similar small stature. Hoping someone can provide their experience with one
 
Pretty cool, but I'm on the skeptical side TBH. Seems pretty low profile for something that needs to move air under pressure.
 
I can't speak for that particular pump, but I had a pump that was an add-on to a jump pack I have (can't remember the name offhand). It's a square about the length of a deck of cards, about an inch and a half thick. I would put any pump in that size class as an in-case-of-emergency type pump, or as an inflator for your hacked pump up sprayer.

After using the little square guy a handful of times you could tell the internals must have gotten worn because they're just not meant to churn for extended periods of time - it would take noticeably longer than it originally had to bump pressure up. Still, better than no air in an emergency; especially when so many gas stations charge to run the air hose these days.
 
As oneheadlite said, this seems like it might be good to keep in the car for an emergency, but since it's $75+, if you have room at your residence, you can get a small pancake compressor for less than that, that would be more durable.
 
Tons of similar ones on Amazon for a lot less.

I just got one from Ryobi for $30


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I have a Milwaukee M12 inflator and it's great. I'm already in the M12 system with a couple of tools and extra batteries, so it made sense to get it too. It's small enough, not terribly loud, and can top off 8 tires with the small 2.0V battery.
 
So after seeing this thread and then watching some videos etc, I decided I want one lol. I ended up buying one that someone suggested on a nerd podcast I listen to. It's a Ugreen battery operated tire inflator. I bought it off Amazon earlier this month. It's $60 currently, same price I paid the beginning of January. It comes with a few fittings for sport balls and different valve sizes. It charges USB-C and has inflation modes with default settings, but you can easily change the inflation level to whatever you want. The only thing I didn't like was that the car mode was in bar. Minor complaint as you can just convert, but my wife would not remember what those conversion were and have to look it up every time. I think you might be able to set the default, so maybe that would help with that issue. Anyway, this thing works pretty damn good and it was really nice when the temps got down below 0 and the tire pressure warnings came on both cars. I could just connect it to the tire and push a button and run back in the house lol. It only took like 40 seconds to go up 5 PSI on the tires, then it stops automatically. Much better than having to plug in the compressor and wait for it to fill, do my business, and then have to let all the air out of the compressor.

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