ONE+ 18V Lithium-Ion Cordless High Pressure Inflator with Digital Gauge $20

It's been $20 for a while now

good deal. I got it previously and it has been helpful. Used it just last week to pump up a completely flat tire to bring the car to costco for all 4 new tires. Good to have if you are already on ryobi system

I see for these kinds of things they benchmark the ability to fill a tire in X minutes to Y PSI based on their 4.x Ah battery pack.

But what I'm wondering is if one buys the 1.5 or 2.x Ah capacity battery pack and the battery is reasonably close fully charged how much use can one get out of this kind of unit? Will it inflate a typical passenger car tire fully from 0-30 or 35 PSI in a reasonable time using a 1.5 or 2 Ah battery?

Buying the low end or medium range battery would be more tempting for a "just leave it all in the car" sort of tool than a relatively expensive high end pack which then becomes not so conveniently available to use for other purposes and which might degrade due to the humidity / heat etc. in the car.

I see for these kinds of things they benchmark the ability to fill a tire in X minutes to Y PSI based on their 4.x Ah battery pack.

But what I'm wondering is if one buys the 1.5 or 2.x Ah capacity battery pack and the battery is reasonably close fully charged how much use can one get out of this kind of unit? Will it inflate a typical passenger car tire fully from 0-30 or 35 PSI in a reasonable time using a 1.5 or 2 Ah battery?

Buying the low end or medium range battery would be more tempting for a "just leave it all in the car" sort of tool than a relatively expensive high end pack which then becomes not so conveniently available to use for other purposes and which might degrade due to the humidity / heat etc. in the car.

I used mine with the 1.5 battery (fully charged) to add 10 PSI to each of my four 235x60x17 tires in 35 degree F no problem, used a little less than 3 volts of battery charge, not sure yet percentage wise how much of total capacity that is. I didn't have a watch or phone with me so I timed by counting, each tire took a count to about 110 for the 10 PSI.

I don't own the digital version, mine is the older analog gauge model; so take what I say with a grain of salt and weight it accordingly

I normally use mine with a 2Ah battery. I don't normally use it for a 0-X refill, it really shines for "topping up" a tire or multiple tires. You can use it to refill a tire, maybe even two with a 2Ah, three or four with a 4Ah. Topping up tires, you definitely can do several with just a 2Ah battery.

But at the point of refilling multiple tires you're going to start running up against duty cycle issues: five to ten minutes of run time followed by up to a half hour of cooling off per cycle. Several of the tool test YouTubers have done torture tests on these kind of inflators, and they can and will destroy themselves if you push them too hard: overheating, followed by failure of internal parts, seals, and o-rings in the pump, leading to either total failure of the pump or loss of pressure.

It's also decent and useful for other pneumatic tires: carts, bicycles, motorcycles, lawn tractors. I've got a tools/materials handling cart I use for A/V and convention setup that has pneumatic tires, I store it in an off-site, long term, indoor storage unit and occasionally take my inflator with me when I go to check on the storage unit, you know top up the tires if they're looking a little low or getting a flat spot: it's a relatively handy and cordless tool for that.

this is always this price.

I just picked up both the Hart inflators for $8.00 and $13.00. They work surprisingly well.