Tesla's 4680 battery aimed to deliver better range, safety, and cost-efficiency. But early results have been underwhelming. Find out what’s happening behind the scenes and why this matters for the EV ...

Five years after Tesla (TSLA) unveiled its 4680 battery cell at Battery Day with promises of 5x the energy, 6x the power, and 16% more range, the data tells a very different story. Tesla’s homemade ...

For years, one aspect of Tesla Inc.’s business has been growing outside the public eye, its revenue soaring even as the company’s electric car sales sputtered and stalled. Now analysts wonder whether ...

Tesla is recalling around 10,500 of its Powerwall 2 home, backup battery systems due to risk of overheating, burns and fires. The U.S. Consumer Product Safety Commission and Tesla said, in a recall ...