Batteries make up around 30% of the cost of an EV, according to some estimates.
Buyers of vehicles with the 4680 battery have complained that they are not as efficient as promised.
He doesnt know how to make a battery.
Founder of Chinese battery giant CATL says Elon Musk will fail in efforts to develop new battery technology.Bloomberg / Getty
Hes good for the chips, the software, the hardware, the mechanical things.
That success might be making Zeng somewhat complacent.
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