In support of my above comment, I invite you to research the Toyota Highlander EV hybrid and it's Ni-MH battery pack.
The company that bought the patent for the Ni-MH batteries that were in use, as I understand it, will not allow battery sizes to be sold that are sufficient to power a vehicle, for whatever reason. Toyota, as a result, was forced to stop production of the Ni-MH battery pack in the Highlander EV, and since Ni-MH was the only viable choice for them at the time, subsequently canceled the Highlander EV altogether.
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"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"
I'd like to think that people might open their eyes at some point... instead, I find it more and more likely that I'll just close mine.
-- Author kept secret.
Je ne veux pas d'une meilleure vie. Je veux être heureux avec celle que j'ai maintenant.
(I do not want a better life. I want to be happy with the one I have now.)