[extraduder_ire]

I thought lithium wasn't especially valuable, especially compared to the other things that go into a battery. I'd buy that sodium is cheaper though, with the amount of sodium salts that are knocking around the economy.

[jillesvangurp]

The price of lithium fluctuates a bit. Currently around 37 dollars per kg. A kg of salt is a lot cheaper. Just check in your local supermarket.