About 12V Air Compressors
Cheap 12V cigarette-socket inflators reach 35–45 PSI and 5–8L/min — enough for emergency tyre top-ups but slow. Battery-clamp 12V compressors at 100 PSI+ and 50–70 L/min handle 4×4 tyres comfortably.
Look for an auto-stop pressure switch, a real digital gauge (not a wobbly analogue dial), and a large heatsink for back-to-back inflations.
Top UK 12V picks: Ring RAC900, ARB CKMA12, Slime 40026, Michelin 12266.