An older chemistry based on Lithium Metal Polymer and updated by DBM Energy (excellent performance from the current generation of batteries):

"The yellow and purple Audi A2 car took around seven hours to complete the 600-kilometre (372-mile) stretch, even had the heating on.

Driver Mirko Hannemann, the chief of DBM Energy, drove the distance at 90 km/h (55 miles per hour) on average, had the heat on and was able to whisk around a few more miles in the city. When the A2 electric finished, it still had 18% of the initial electric charge in the battery.
　
It has a lithium-metal-polymer battery. DBM Energy, the company that built the battery and electric motors into the Audi A2, said the battery would function for 500,000 kilometres.
　
A representative of the car said the Audi still featured all the usual creature comforts such as power steering, air-conditioning and even heated seats as well, so it was not like the car was especially made for long distance record attempts
　
　
The battery, based on what DBM Energy calls the KOLIBRI AlphaPolymer Technology, comes with 97 percent efficiency and can be charged at virtually every socket. Plugged into a high-voltage direct-current source, the battery can be fully loaded within 6 minutes
　
What's more important, the technology which made the trip possible is available today.
　
German Economics Minister Rainer Bruederle, who subsidized the drive, said it showed electric cars are not utopian but really work"

http://green.autoblog.com/2010/10/27...ance-record-3/