Re: Electric car batteries don't "swap"
Ok, I'm wrong. And this is how it works:
"...Ideally, the [Tesla] Model S owner will return to the station and retrieve the original battery pack when finished with the replacement pack, once again paying the service fee [currently about $60 to $80]. The owner may choose not to go to the station and have the older pack delivered to them for a fee, or choose to simply keep the replacement pack and Tesla will submit a bill for the value difference of the battery pack based on its age."
And you do this every week, right? And you live handy to a Tesla Station? Or Tesla and BMW and Nissan will have interchangeable batteries?
But hey, why don't you keep a spare battery pack at home and swap it whenever it suits you (but did they mention that it weighs 544kg? see http://www.roperld.com/science/TeslaModelS.htm )