Not that there is any suggestion of lithium shortage but for those who want to complain that lithium comes from outside the US, that may not always be true:
http://www.treehugger.com/cars/vast-reserves-lithium-found-wyoming-could-meet-all-us-demand.html
This site has some characteristics that might make lithium mining cheaper as well.
http://www.treehugger.com/cars/vast-reserves-lithium-found-wyoming-could-meet-all-us-demand.html
This site has some characteristics that might make lithium mining cheaper as well.