[anifow]

Sorry, that's been solved. There are efforts to implementing this exact network of fuelling stations (battery swapping) for electric cars, and Better Place is a shining example from Isreal:

http://www.ted.com/talks/shai_agassi_on_electric_cars.html

http://www.globes.co.il/serveen/globes/docview.asp?did=10007...