Model 3/Y

Tesla’s 4680 battery cells are underperforming and frustrating buyers

Tesla's in-house 4680 battery cells are underperforming compared to supplier cells, delivering worse energy density, charging speed, and range than originally promised. The company has begun quietly swapping supplier batteries for these 4680 cells in European Model Y vehicles, leading to noticeable downgrades that are frustrating owners. For Tesla enthusiasts, this means vehicles equipped with the 4680 cells may offer less range and slower charging than earlier models using supplier batteries.