What Is the Best Battery-Powered Tire Air Pump?

The best battery-powered tire pump runs on a battery you already own, so pick by the cordless tool brand in your garage. If you own none, get one with a built-in battery, and if your tires are large or you fill in deep cold, use a 12V Viair.

• You already own Milwaukee M18 batteries: it was the fastest handheld in its test, taking 30 psi in just over a minute from 10 psi on 235/55R19 tires, and it stops at the pressure you preset. The tool comes without a battery. Get the Milwaukee M18 inflator.
• You already own DeWalt 20V MAX batteries: this inflator also runs from a 12V plug or a wall outlet, so a drained battery doesn't end the job. It shuts off at the target pressure you set on its digital gauge. The battery and AC adapter sell separately. Get the DeWalt 20V MAX inflator.
• You already own Ryobi 18V ONE+ batteries: this inflator reaches 150 PSI and shuts off on its own for hands-free filling. Get the Ryobi ONE+ inflator.
• You own no cordless tools and want one self-contained pump: the lithium-ion battery is built in and charges over USB-C in about 4 hours, and the pump shuts off at the set pressure. Slime rates it for 3 tires per charge, flat to full. Get the Slime cordless inflator.
• You also want to jump-start a dead battery from the same unit: this pack pairs a 160 PSI compressor with a jump starter and ranked 4th of 13 in a jump-starter test, passing a rapid-start check. It also charges phones over USB-C at 65 W. Follow the pack maker's and your vehicle maker's instructions to jump start. Get the WOLFBOX combo.
• Your tires are large off-road tires, up to 37 inches, or you refill often: a 12V compressor has effectively unlimited runtime, and this one is rated for tires up to 37 inches. It comes with a 30 ft hose and an inflation gun with a 160 PSI gauge. Get the Viair 12V compressor.

Whichever you pick, fill to the proper cold tire pressure printed on the label in your driver's doorjamb. The number molded into the sidewall is the tire's maximum, not your target. Then confirm the result with a separate gauge, because no gauge in a 2024 timing test of cordless and plug-in inflators read 100% accurate. The best air compressor for car tires page is for drivers who would rather skip cordless tools entirely.

Slime recommends no more than 10 minutes of continuous use on the cordless unit Automoblog reviewed, so fill in bursts and let it cool between them.

Cold changes the pick. Below 20°F cordless units can lose performance, so if you fill tires in that weather, take the Viair. Power it the way your vehicle manual allows, because socket limits vary by model, and never fit a bigger fuse to stop one blowing. The best portable air compressor page is for readers who would rather run a 12V unit than a battery.