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AstroAI L4 Portable Tire Inflator: What to Know
The L4 is rated to 150 PSI and, like the Fanttik, is a self-contained unit with no tool battery or vehicle connection required. The Gadgeteer's independent review timed it filling a 225/75R17 tire from 30 to 36 PSI in 90 seconds, again a top-off rather than a fill from flat, so it's directly comparable in kind (if not in exact numbers) to the Fanttik's tested time.
Power comes from a built-in rechargeable battery charged over USB-C. AstroAI's own product page, in the portion that could be accessed, did not list a battery capacity or runtime figure. That number, 6600mAh, good for about 40 minutes of runtime and roughly 8 tires per charge, comes from independent reviewer testing (The Gadgeteer, UltimateMotorcycling), not directly from AstroAI's own spec sheet, a real gap between the manufacturer's public materials and third-party reviews worth flagging rather than papering over.
The L4 has auto shut-off at a preset pressure, confirmed via independent reviews and retail listings even though it wasn't fully detailed on the specific manufacturer page accessed, plus a digital display and presets for car, motorcycle, bike, and ball inflation. At 1.1 lbs and roughly 7.2 x 4.6 x 1.1 inches, it's noticeably smaller and lighter than the other four inflators in this guide, which trades off against its smaller battery and lower CFM airflow compared to full-size units.
Key Listed Features
150 PSI max with a digital display and auto shut-off at a preset pressure
Built-in rechargeable battery charged via USB-C; independent testers report roughly 40 minutes of runtime and about 8 tires per charge
Five inflation presets (car, motorcycle, bike, ball, custom) across PSI, kPa, bar, and kg/cm² units
Compact build at about 1.1 lbs, with an onboard LED light offering flashlight, SOS, and strobe modes
