This powerful, professional-grade Schumacher jump starter boasts an amp rating of 4,400. It’s capable of jump starting even heavy-duty trucks, with two accessory ports and a rapid-charging feature.

This powerful, professional-grade Schumacher jump starter boasts an amp rating of 4,400. It’s capable of jump starting even heavy-duty trucks, with two accessory ports and a rapid-charging feature.

They’re everywhere today, but lithium-ion jump starters only first appeared in 2013. Now there are thousands of them ( ...