Tire Inflator Portable Air Compressor - 180PSI Cordless Air Pump 20000mAh Power, with Rugged Hard Case, 3X Fast Inflation, Accurate LCD Pressure Display for Car, Bike, Motorcycle Tires & Balls (Black)

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This CTWJO tire inflator is great because you can leave it in your trunk and use it from its internal Li-Ion battery or (in case you forget to charge it periodically) it can run from the car’s battery. The internal battery charges by USB-C. (A cable is included.)Even on a full charge, if you connect the inflator to a car’s power port, it automatically switches to the car’s power. There is no indicator that shows that it’s using a different power source but the screen toggles off and back on.This inflator is fast. Timed with a stopwatch for my SUV tires… When filling the tire from 32 psi to 34 psi (whether on internal battery or the car’s battery), it only took 40 seconds (or 20-seconds per psi). Impressive.This inflator is accurate. This inflator’s reading is about 0.1 psi lower than my 2 trusted digital tire pressure gauges, but that’s impressively accurate. Very happy with that. And it can be set to ½ psi increments, which is nice.This inflator has a built-in flashlight and emergency-flasher light which work whether or not the tire is being pumped. Good features.The power-port cable is ~9ft (~2.7M) by my measurement. For my 2007 Chevrolet Equinox midsize SUV, that’s long enough to reach all 4 tires from the power-port in the front-cabin (with almost 2’ (0.6M) to spare for the rear tires. I would like to see that be about 1 foot longer, but it works for all of my vehicles.The user manual is pretty well written, but the product is so intuitive that I didn’t need to read it. I read it after I used it. There are user-created pressure presets for 4 different targets (like car, motorcycle, & bike). You connect the hose to the inflator and the tire, you set your chosen pressure, and turn it on. It stops inflating when it reaches the set pressure.The inflator has a USB-A port so that the inflator’s battery can be used a power bank. Nice bonus feature. It does not support fast-charging protocols.The inflator comes with a Shrader-to-Presta adapter for inflating Presta-valve tires, a nozzle for inflating toys, and a needle for inflating balls.The inflator can be set for different pressure measurement types, like PSI, Bar, Kpa, & kg/cm2. It retains the last used measurement type except when you use the car’s power port—in which case it switches to Bar. Seems like a bug in the firmware, but it’s a minor inconvenience. I’d deduct a half-star if it were possible but this is the best tire inflator that I have, so I’m rounding up to 5-stars.

I originally had a large portable compressor that plugged into my lighter outlet, but this truly portable compressor does everything my old model did, but does it better and has a few tricks of it's own. You can charge your phone through a USB cable and have also a flashlight and emergency light as well. The metal construction makes this a serious tool to keep in your car for those times that you are not near an air pump and have a flat!!!

As others have mentioned, this is an excellent backup "throw it in the glove box" scenario. It has a mediocre light which works in a pinch, and doubles as a battery bank for charging up other devices and that may be more valuable for many people. The main function to inflate a car tire is feasible and works but at the cost of time and heat. It will warm up, and take 1 minute per psi once you get in the 30-40 range. Good in a pinch but would not rely on it to say, quickly get all 4 of my tires filled up before a road trip. Unless you have say, 40 minutes to kill. Despite the drawback, it is enclosed in a nice handheld design and while I have not tried it yet for other purposes, it can do more for sport balls, bicycles, and whatever else that uses air. All the adapters included for such scenarios.

These portable air pumps are awesome. Small and easy to store. Definitely beats the old style portable compressors that had the super long cord cigarette lighter plug. The instructions are poorly translated to english but it’s simple to figure out. I have 2 of these now to keep in each vehicle for emergencies.