Tesla puts 4680 battery cells back in Model Y; Here’s why
Tesla has resumed using its own 4680 battery cells in the Model Y, primarily to avoid new import tariffs rather than for a major technological upgrade. This shift was made possible because the slower-than-expected Cybertruck production freed up battery cell supply. For owners, this means some new Model Y vehicles will contain Tesla's in-house battery cells, but not due to a performance breakthrough.