The 4680 cells have already found their way into some Tesla vehicles, including the Cybertruck. Moreover, the company reached a significant milestone in September, announcing that it produced 100 million of these cells – an achievement that came just over three months after Tesla had announced producing 50 million 4680 cells, indicating a rapid acceleration in production.

Zeng and Musk reportedly clashed over Tesla's battery strategy during a heated debate in an April meeting. According to Zeng, Musk was silent in the face of Zeng's critique. "He doesn't know how to make a battery," Zeng told Reuters.