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First the Plug in Prius was using Lithium ion back in 2010 page 1: https://techinfo.toyota.com/techInfoPortal/staticcontent/en/... Non plug in hybrids want different battery chemistry as the charge / discharge cycles are much more frequent.

Second that timeline from 2016 to 2018 was Panasonic cells.

To be clear Tesla does employ battery experts directly and invests serious money into R&D, however that’s really just a pile of money for the time period I was talking about without Panasonic. Anyone can try and kick things off from scratch, without the IP and technical expertise from Panasonic Tesla wouldn’t have had those kinds of turnaround times.

As to everyone kicking things off yea, but Toyota is already spending ~10 billion on battery manufacturing over the next 8 years. It’s very different to ramp that up than simply starting from scratch.



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