DC to DC Notebook (Laptop) Auto/Air Adapter Car/Air Power Inverter Hi-Capacity AA-D56 * Chemistry: Auto/Air Adapter * Volts: 19 TO 21 * AmpHours: 0 * Color: Black * Description: Notebook computer slim line auto/air adapter. * Dimensions: 3.85 x 1.64 x 1.00 * Weight: 0.7 lbs