compressor + usb power bank could work. But I do wonder how much time this thing needs to recharge... Next thing you would notice is people are bringing with them self 2, 3 or 4 of these with them + usb power bank
Also like you told. If my mind doesn't play tricks, people on forum are mostly on 30 psi - 35 psi. At least that is how I remember from all the threads I was reading.
But I do see potential in this little can. If they could somehow manage to make direct power with pack of batteries for example like I made my bicycle camera, it would be more ''time'' proof. Battery pack with long cord. But then it wouldn't be cordless. I wonder how much mAh that little compressor has. You can get 20 000 mAh battery packs on ebay. Just thinking out loud. Would love if someone would borrow me this little can for a day so I can play with it. Not worth to invest 50 bucks for me. But if someone is willing to borrow why not