That guy on Undecided is a bit of a dunce. He never actually checked or tested in any way that the yoshino psu uses real solid state batteries. He just bought it from Amazon and it’s advertised on Amazon as having them.
But they likely aren’t solid state batteries in that psu he bought. He even admitted as much in a podcast just last week.
Other people have done teardowns on those yoshino batteries and have apparently found that they are not solid state. They still contain a liquid.
Here. I think he talks about it somewhere around 25 minutes in. https://www.youtube.com/watch?v=aciA1dKz5iE
Correct, but it’s on well enough authority that the batteries exist and are in production and that units are in the hands of EV manufacturers for them to play around with. Consider it like the time period when no one has the next game system yet, but everyone knows that all the game developers have the dev kit for the soon to be released system.
