Exxon upgrades lithium car batteries

U.S. researchers say they've developed a plastic film that will make it easier for automakers to use lithium-ion batteries in electric cars and trucks.

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<p><a href="http://www.physorg.com/news115538435.html">Exxon upgrades lithium car batteries</a></p> <p>U.S. researchers say they've developed a plastic film that will make it easier for automakers to use lithium-ion batteries in electric cars and trucks. </p>