A Tesla battery researcher showed updated test results pointing to batteries lasting over 15,000 cycles or the equivalent of over 2 million miles (3.5 million km) in an electric car. Last year, we reported on Jeff Dahn and his lab, who is under contract to do battery research for Tesla, releasing a paper that shows how the latest Li-ion battery technology can produce batteries that would last 1 million miles in electric vehicles. In a new presentation, Dahn discussed updated test results from this new battery, which he hopes becomes the new standard Li-ion battery against which new battery technologies benchmark themselves. The scientist, who is widely recognized as a pioneer in Li-ion batteries, referenced our article from last year about their paper and said that it sparked a massive interest in this new battery chemistry and battery longevity. They have continued testing those batteries with some of them going on three years of testing and over 10,000 cycles: Dahn now concludes that these batteries in a medium-range electric car would be able to last over 3.5 million km or over 2 million miles. He also showed results based on different depths of discharge, which means to what percentage […]


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