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FILE - In this March 9, 2020, file photo, Tesla and SpaceX Chief Executive Officer Elon Musk speaks at the SATELLITE Conference and Exhibition in Washington. Tesla is expected to announce a breakthrough in electric vehicle battery chemistry on Tuesday Sept. 22 that could bring down the cost of the vehicles and increase their range and durability. At an event called “battery day,”  Musk likely will show off the new technology, which could increase the traveling range per charge and durability of its batteries.(AP Photo/Susan Walsh, File)

Tesla CEO Elon Musk's next big bet rides on better batteries

Sep. 22, 2020 8:51 PM EDT

SAN RAMON, Calif. (AP) — Tesla is working on new battery technology that CEO Elon Musk says will enable the company within the next three years to make sleeker, more affordable cars that can travel dramatically longer distances on a single charge. But the battery breakthroughs that Musk unveiled Tuesday at...