ZEPHYR S3 Tire Inflator Portable Air Compressor

I bought the smaller version of this tire inflator because I wanted something lightweight, practical, and easy to keep in my trunk without adding extra bulk. It’s perfect for daily commuting, long trips, or just peace of mind. Beyond car tires, it comes with adapters for basketballs, footballs, bikes, and motorcycles, making it very versatile. It charges with a standard Android charger and I always leave it fully charged so it’s ready when needed. This inflator has already saved me a few times. It’s not meant to completely replace a tire shop, but if you get a flat or just need air to reach the nearest shop, this will absolutely get the job done. I especially find it useful in the winter months when tire pressure naturally drops — I just top off my PSI at home instead of wasting time and quarters at a gas station. Keeping your tires at the right pressure also helps with fuel economy and ride comfort, so it pays off in multiple ways. Performance-wise, I give it 5/5: • Very compact and easy to store. • Quickly tops off car tires. • Reliable for emergencies and peace of mind. • Great versatility with included adapters. The only trade-off is the battery life, which isn’t very long due to the smaller size. Filling all four tires up to ~35–38 PSI will already drop the battery a bar or two, and if you’re filling multiple vehicles it drains even faster. If you want longer runtime, the larger version is a better option — but for practicality and portability, this smaller one is perfect. Bottom line: For the price, convenience, and reliability, this is one of the best safety items you can keep in your car. It won’t replace professional equipment, but it will definitely get you out of a pinch. Highly recommended.

I got this after the one I had died. This thing is great! Compact, easy to use, and has long battery life. Great to just leave in my trunk on road trips and saves me money and time from having to stop at a gas station/rest stop. I have one tire that is a little leaky, so having it in my car at all times helps me get back on the road all the time. The settings are easy to see with the digital display, and the automatic shutoff feature is my favorite, so I can set it and forget it.

Inflated eight tires from 28psi to 35psi in around two minutes each. Unit did not get hot. Only used around 60-65% of charge. Very powerful LED light. Checked tire readings inside my two cars after the inflations and all eight readings were at 35psi. Could sit on a chair while using; much easier on back and knees. The preset at 35psi and the auto shutoff are great features. Pressure hose stores nicely and is of very adequate length. Pressure hose connects quickly and securely to tire stem. Totally clear and understandable instruction book -- a rarity these days. Great compact carrying case. Item arrive packed very carefully and securely. When one is unwrapping it, you immediately get the idea that the company cares about giving you a quality product and a very good experience. No need to go to service station and pay to use fickle, expensive air hoses. One of the most useful and high-quality products this 83-year-old has ever bought!

This thing is just great. First, each unit comes with a calibration certificate so you know that not only are the pressure readings within tolerance, the speed of inflation is as well. It is just remarkably easy to use. The hose snaps onto the tire valve, turn it on and read the pressure. If it is high, bleed it out by pressing a button. If it is low, press another button and it will inflate precisely to your preset pressure. Unlike many portable inflators, this one is fast and it is not overly noisy. Highly recommended!

The tire inflator works well. It doesn't take up much space, and the carrying case holds everything compactly. It's very convenient and affordable. It's easy to charge with a Type C cord and it retains its charge well. I've owned this item and used it for over a year several times on car tires. It inflates quickly and will inflate to the set pressure you choose.

Arrived partially charged and quickly charged to 100%. Nice, compact and well built. All 4 tires were a little low from sitting. Easy to hook up, select the default for car, press the button and walk away. Automatically shuts off at requested pressure. Inflated all 4 tires to pressure without any issues and plenty of charge left to do more. I'd buy it again. It would make a nice gift. In the summer heat, instructions advise to not store it in the vehicle. I'm okay with that. 6/20/25: SUV's tire pressure warning beeped. We pulled into a parking lot and resolved the issue in less than 5 minutes.

Lightweight and very portable. I was a little skeptical about this being able to blow up the tires on my car since I'm used to a pretty stout tank compressor, but so far, it works great. Built in pressure control, which is great.

Super air compressor that is battery operated which increases its capabilities. There are many battery operated air compressors but there aren't that many good or better battery operated air compressors. This is one of the great battery operated air compressors that will do everything that you need from a small air compressor. Highly recommend it.

Unlike the majority of inflators listed, the Etenwolf is manufactured to provide accurate results. As tyre pressure accuracy and consistency is a central safety consideration, I would suggest calibration would be the primary design criteria. In achieving internationally recognised calibration standards, Etenwoolf have not however compromised on useful features including a low pressure inflator and multi-function torch. The compact size, cordless design and useful battery life contribute to its ease of use. Well worth the extra cost for a fit-for-purpose product.

El equipo está super bonito, muy bien diseñado e infla rápido las llantas, el problema es que no infla tantas llantas como dice, por ejemplo, fue probado en un mini cooper, y se les aplico a 3 llantas 15 psi más o menos (de 20 a 35 psi) y 1 se lleno desde 0, ya con eso solo quedo una rayita de 4 de carga del equipo (esto fue durante el primer uso y tras haberlo cargado al máximo), así que es muy fácil de transportar (es minúsculo), ligero y muy bonito, pero para inflar todas las llantas desde 0 no alcanza, es más que nada para una emergencia.

Great to have in car when low tire 🛞 pressure light comes on. Got it for wife’s car and her peace of mind. Unit is compact, not complicated to operate and works as advertised. Great valentines present 😉🤔

Excellent product

Update: April 2025. I am using the unit to swap off winter tires to summers now. The unit shows 4 charge bars at full charge. Each use was from a fresh recharge. My experience pumping 11 sets of tires this spring (winter to summer swap) ranging from 17" to 19" (Odyssey, Rogue, S4, A4, Rav4s, GLC300, GLE350, Elantra, Civic, Camry) indicates the unit from full charge, can pump approx. 40psi TOTAL on a full charge and is not as fast as initially thought. Pumping smaller, thinner tires is much faster and the unit doesn't seem to struggle as much. Egs. Pumping 6lbs into 2 x 18" tires (all after winter storage) uses up 1 of 4 bars. Pumping a total of 40psi into 4 x 22" 285/40/22 and 325/35/22 uses up all the power from a full charge (just made it at 0 bars) and took about 4 minutes for 13psi on the latter tires. This little guy is also not as fast as I thought in 'real tire' application and actually slows down to complete the last 0.2 psi (for accuracy most likely). The bigger and stiffer the tire, the longer the unit takes. But, I am still happy that I purchased this little, very mobile and quiet unit although I am very limited to pumping only 2 sets of smaller diameter tires or 1 set of the 22" rims on 1 charge. So I can't quite stop using my pancake compressor when I am swapping off more than 2 sets in 1 day (do allow for proper pump cool down before doing a USB-C recharge to preserve battery life). Perhaps the newer S5 (higher capacity charge) or the larger Vortex S6 series is a better choice if one owns multiple vehicles or simply needs to blow things up (pun intended) like bouncy castles, etc. January 2025 review: Good packaging. Arrived with all bars charged. The unit has a bright and big #'d display that allows use in any light and dark conditions. It has a very handy auto shut-off feature that makes pumping a tire a breeze. Nice touch also with the light and emergency flash features. For my testing, I chose manual mode on a flatbed's set of 8" pneumatic tires under load (100 lbs). I set the pressure to 31lbs (allowing for the calibration error as stated on the unit's calibration report + disconnecting the unit's lock tab). The result is an 8" tire at 3psi will hit 31psi within 5 seconds with little fanfare and quietly. I can certainly say it beats listening to my 88dB 3gallon air compressor and waiting 5 minutes at least for it to complete its fill cycle. The only issue I have is connecting the unit's bicycle style, output valve head to a tire's valve stem. I tested it on a dolly's 8" pneumatic tires that quickly lost air pressure during the head clamping exercises. But the little guy quickly sorted out any lost pressure (under a load) for all 4 dolly tires. I am keeping this little Wolf for my twice yearly tire changes of over 10 vehicles (cars and SUVs) for my family. Mind you, I'll keep the air compressor handy just in case the little Wolf runs out of air. Doubtful since most tires only need to be pumped up by about 5psi after seasonal storage and tire rotations (rear's usually have higher air pressure). Plus, I also bought the Asurion warranty for this little guy - an addiitional 3yrs for $6 is reasonable imo, especially if I plan to use this in the garage and for in-car traveling and won't really know if anything happens until after Amazon's return period has passed.