The DEWALT DXAE20VBB Battery Pack Booster transforms your own 20V XR 5 AH Lithium-Ion Battery into portable jump starter. Featuring integrated battery charging clamps, dual USB charging ports and a high-intensity LED worklight, this practical battery charger is ideal for unexpected emergencies and everyday charging. Just slot your own fully charged 20-Volt MAX tool battery into the compact, impact-resistant charger and you're just one touch away from starting your vehicle.