julesa said:There are probably still many large deposits we haven't started looking for, because there's no money in it, yet.
That's probably true. More exploration would come with higher demand and the subsequent higher price of lithium, but that doesn't generally bode well with "making lithium batteries more affordable" for the masses. However, future technology may make future exploration and extraction cheaper, which may increase supply which would put a downward pressure on lithium prices while also allowing lithium to be a more common consumable.