Tesla demonstrates battery swap technology. Elon Musk says you only have two choices, do you want it faster
http://www.youtube.com/watch?feature=player_embedded&v=FE81S26XG8c or do you want it free? http://www.teslamotors.com/supercharger In the battery swap demo, they swap out two model S batteries in the time it takes to fill an Audi with 23 gallons (for $100).
