@Cycloptichorn,
Cyclops, remember our past debates wherein I have reminded you and argued the fact that there is a law of unintended consequences with any artificial intrusion into the free markets? There is more to efficiencies of vehicles than miles per gallon. First of all, there are issues of manufacturing the vehicles, and batteries are a part of that. It takes energy to mine, process, and manufacture the materials and batteries, all of which feed into the cost of a vehicle. Then as has been pointed out, there are issues in regard to disposal of batteries, which also takes energy, and costs money.
I have rightfully argued in the past that cost in a free market situation is a pretty good arbitor of the efficiency of products. If an electric vehicle is more costly to own over the life of the vehicle, it just may be an indicator that the vehicle is not yet totally competitive in terms of being the most efficient vehicle out there. You have of course ridiculed my argument about this, but I think this discussion again deserves me to point out the realities of the situation in regard to how electric vehicles compare to traditional vehicles, and that there are many issues besides miles per gallon of gasoline consumed. So, simply having the government mandate a standard for mpg is a very shallow minded and short sighted policy, as again there will be as there always is, unintended consequences of these types of government regulations.