[Kimm0n0]

The funny thing is that Toyota for years have said they had this technology in development, but they ended up purchasing the tech from another company.

[ChatGTP]

In Japan development might mean going out for drinks with the other company :)

[outside1234]

In automotive the OEMs almost exclusively purchase from suppliers like this and develop very little actually in house directly. That said, they can be heavily involved in its development, like it sounds in this case. This is partly done for liability reasons (supplier takes the liability if this battery catches on fire, not Toyota)