For large trucks and professional vehicles this 70 Amp Rolling Battery Charger with 210 Amp Engine Start can be a real day-saver. It features heavy-duty cables for proper energy delivery under heavy load. Diagnose battery issues with the Alternator Check function. This unit is built to last with metal powder coated clamps a tough metal housing and onboard cable and clamp storage to keep them organized and protected when not in use. Easily transport the whole unit with a retractable handle that retracts for storage.