Tesla Motors has unveiled a new battery pack for the performance versions of its Model S and X cars that will extend the range and mean faster acceleration. Elon Musk, chief executive of the electric car maker, hailed the upgraded battery as a “profound milestone”. He said the battery cell chemistry is the same, but the reconfigured product stored more energy in the same space. Tesla, which this month posted a steeper-than-expected loss, is adding…
Tesla’s Elon Musk says new car battery is a milestone
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