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Just some bits I took from the latest Lithium investing news article

Battery applications are growing significantly faster. We expect to see that sector increasing about 12.6% per year going forward to 2020. The others will continue growing, but more on pace with the global GDP, closer to 3%.

New lithium extraction technologies are emerging, and, if successful, may further lower the cost of production at brine deposits, widening their economic advantage over hard-rock deposits.