Damn. Totally forgot about this thread. To give a (very late) answer to DC's question, Large format NiMH batteries would work very well in electric cars if we could build them, but we can only build them at certain (small) sizes and power outputs. So yes, the batteries we are allowed to build are antiquated.
Toyota made an electric car (if I recall it was the RAV 4) that used these illegal batteries before the inventor sold the patent to GM, which then immediately turned around and sold it to Texaco/Chevron. They got sued and don't make them any more, but 11 years later and the batteries in the few remaining survivors are still running fine.
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