Spark EV Will Offer A.C. or D.C. Charging

8:29 a.m. | Updated WHITE MARSH, Md. – Electric cars can take a while to charge. In part, that’s because the alternating current electricity that comes from the grid has to be converted to direct current before a car’s batteries can store it, and the capacity of the electronics that make the A.C.-to-D.C. conversion is a bottleneck.