This GPK Systems Auto Power Adapter is the direct replacement for Apple Auto Power Adapter  The GPK Systems Auto Power Adapter enables you to power your laptop in your car. An energy-efficient power adapter, designed to draw minimal power. With integrated surge protector to guard against power fluctuations.If you want to use your computer in the car without using up the battery you can save energy and weight by using one of these high tech switch mode DC converters (car cords). They are so small, light and reliable you might want to leave your AC adapter at home. This travel adapter is a voltage-boosting DC/DC converter designed to power or charge a Toughbook from an automobile power point or cigarette lighter. GPK Systems DC C more »