Shares of Lithium companies have surged after Tesla Motors Inc. boosted its outlook for electric vehicles powered by batteries that use the element, sending the Solactive Global Lithium Index up by about a third since the middle of February. Production of the light metal may triple over the next 15 years, driven not only by car sales but also utility-scale batteries being installed on power grids, according to Bloomberg New Energy Finance. Tesla is building a battery factory in Nevada that may cost as much as $5 billion -- located near the only U.S. lithium mine.
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