88
      Tuesday
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      Wednesday
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      Thursday
      93 / 73

      NHTSA investigating safety of Chevy Volt batteries after 2nd fire in test

      WASHINGTON (AP) - Federal officials say they are investigating the safety of the lithium-ion battery in General Motors Co.'s Chevrolet Volt after a second battery fire following crash-testing of the electric car.

      The National Highway Traffic Safety Administration said Friday that three Volt battery packs were crash-tested last week. In one instance, the battery caught fire afterward, and in another the battery emitted smoke and sparks.

      Last May, a fire erupted in the battery of a Chevy Volt that had been damaged during a government crash test three weeks earlier. Last week's tests were an attempt to replicate the May fire.

      NHTSA has opened a formal safety defect investigation of the batteries.

      General Motors officials said previously that government officials didn't follow the carmaker's protocols for storing post-crash batteries.