Tesla has started building Model Y battery packs with its in-house 4680 cells again, more than two years after pulling the plug on the original 4680-equipped Model Y to prioritize Cybertruck production. Here’s what actually happened:February 2022: Tesla announced it had produced 1 million 4680 cells at its Kato Road pilot facility in California. April 2022: The first Model Y vehicles built at Gigafactory Texas with 4680 cells and Tesla’s new structural battery pack started shipping to employees. December 2022: Tesla confirmed 4680 production had reached 868,000 cells per week, enough for about 1,000 Model Y vehicles. September 2023: Tesla quietly discontinued the 4680 Model Y AWD, removing it from the configurator entirely.