Clore Automotive Jump-N-Carry JNC660 1700 Peak Amp Jump Starter

This is the unglamorous professional answer. The JNC660 is a lead-acid shop pack rather than a pocket lithium booster, which means it is heavy, it wants charging every few months whether or not you use it, and it will not slip into a glovebox. In exchange you get clamps with real jaw pressure, cables thick enough to carry current properly, and a unit that shops have been buying for two decades because it starts things the small boosters give up on. Buy it if there is a garage to keep it in and more than one vehicle to rescue. If he wants something to live under a car seat, a compact lithium unit is the honest choice instead — this is not that.

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