http://www.usatoday.com/story/money/markets/2016/04/14/tesla-tech-icons-scramble-lithium-prices-double/83034300/ I think this is something I really didn't take into account before. Sure, technology can get better and more efficient, as the amount of batteries produced increases. However with increasing demand for the raw resource, the commodity price will increase as well! I mean if EM wants to produce 2x the amount of batteries as the world produces today, then it would make sense the commodity that's absolutely necessary in its production to get more expensive, just like if you suddenly need a lot more oil, oil price will go up. What do others think?