Thanks to standards set earlier this year by the Society of Automotive Engineers (SAE), charging docks like the GE WattStation—which arrives next year in both home and public versions—can connect to any new EV or plug-in hybrid. Designed by Yves Béhar, known for his work on the One Laptop Per Child computer, the WattStation delivers a 24-kilowatt-hour charge, good for approximately 100 miles' worth of driving range, in four to eight hours, for about $3. (You'd spend $12 to cover the same distance in a 25-mpg car using $3-a-gallon gas.) On public versions, you can pay with a credit card. A commercial unit will cost $3,000 to $7,000, with wall-mounted home chargers closer to $1,500, a blow softened by the federal tax credit covering half the cost.