I bought this thing a few weeks ago and charged it over night.  Then I let it sit for a couple of weeks.  A few days ago I added 5 psi to four large car tires and topped of my trailer tires. Then I let it sit for another few days. This morning I decided to test on an empty motorcycle tire.  The biggest tire I have is a 4V RS rear - 120/70-17.  I took the valve core out to let all of the air out and then replaced it. It took a little over 6 minutes to go from 0-40 psi. It had no problem doing that and seems to have plenty of battery left.

Despite warnings that it can get hot it only got mildly warm, unlike the Slime and some other mini compressors that can get really, really hot.

It stopped right at 40 psi.  It seems to be accurate because I tested it with two digital tire gauges that I trust and they both also read 40 psi.

The Amazon listing claims it will fill three car tires or eight motorcycle tires.  I don't know if I believe that but after my little bench test I'm very confident that it will fill a motorcycle tire - which is what I need if I get a flat.  And obviously it's good for topoffs.

It's not the most compact compressor but considering it's got a built in battery in it it's pretty darned small: 9.5" long and 2" in diameter.  I weighed it and the hose on a digital scale and it only weighs 1.5 pounds.

It also seems solidly built to last.

When I used it on my car and trailer tires it was incredibly convenient not to have to mess with a cord to power it.

It recharges from either household 120V AC or from 12V DC. (Which means I can recharge it in my electrified tank bag while riding.)

I give it two thumbs up   and will be carrying it when touring in the future.  And I'll be using it at home to top off my cars and bikes.

Here's the Amazon link:
https://www.amazon.com/gp/product/B07H3LP4LL/ref=ppx_yo_dt_b_asin_title_o07_s00?ie=UTF8&psc=1

These are now only $32 on Amazon.  Highly recommend.

It must be xmas now that they're up to $48.99!

Oasser

Two Wheels Better wrote:It must be xmas now that they're up to $48.99!

Amazon's data-mining all your cookies knows your living in the pristine PNW & OZ

Innards of NYC they're charging $38.99

I'm still using the BestRest Products air pump I bought in about 2004, 15 long years of travel ago - it's been all over the Americas, Australia and parts of Europe with me. It makes a racket, vibrates all over the floor, has to be plugged into a 12V source, but has never failed me (yet) and although a bit spendy, has returned its value in spades. Plus, for those in the US Pacific Northwest, it's a locally made product. I have the original, old school version. This new one looks the biz. 

Note of disclaimer: I know the manufacturer personally.

BestRest Cycle Pump