Now and again, your car’s tires lose air. Just a pound or two here and there. If you have an air compressor in your garage, it’s probably heavy and needs plugging in; if you don’t, you’ll need a pocket full of quarters and a nearby gas station, assuming your tires aren’t so flat that they’ll get damaged if you run on them.

Not long ago, when I had some tires to inflate, a friend pressed this little gizmo into my hand: Fix Manufacturing’s Eflator. Literally, it was a gift: It came with neither box nor directions but was intuitively simple to operate despite this. Not much larger than a cellphone, resembling a walkie-talkie, weighing in at around one pound, and operating on a rechargeable 2000 mAh battery, it happily inflated the pneumatic tires on my deflated hand truck in about 38 seconds. A successful test. Not long after, I tasked it with inflating the four flat tires on my long-suffering Model A Ford, just enough to be able to roll it down the driveway for its tow.

Just screw the cap onto the Schrader valve until the join stops hissing, switch it on, and stand back. I pressed the M button (for Manual) on the front of the pump, and let it do its work; you can also set it for a given pressure. The eflator was designed for bicycles and motorcycles, but it worked great on my A. All four of my Model A’s 19-inch Allstate tires were pumped up to 15 pounds, according to the large, clear digital readout on its face, with it taking less than five minutes per tire to get there. Once that ancient, cracked rubber was sufficiently inflated, I rolled the A down my mother-in-law’s driveway to await its tow, and the pump itself slipped back into the glove box in my van. There is a rubber sheath covering the connection between the pump and the hose; do not remove this, as the join between pump and hose gets really hot. The pump itself remains cool enough to touch during operation.

Where the eflator failed was when I tasked it with something it was not designed to do: entirely inflate a car tire. When the Vice Grip Garage charity-auction Silverado had a flat oversized off-road tire after months of sitting in a Phoenix storage unit, I thought I’d give it a shot. Without recharging after my hand truck or the four flat A rubber bands, we made it to about seven and a half pounds of pressure — enough to get it out of the storage unit and onto the waiting transporter — before the batteries simply gave out. So, even in its failure, the unit still succeeded. Had I been so equipped, I could have recharged the unit via its USB-C port. The money spent on it could pay itself back quickly in an emergency, and it will live in most glove boxes or consoles unobtrusively. It comes with a one-year warranty and a nylon carry bag.