> Apparently the first 3rd party test was on fast charging and the 3rd party is VTT, which is the government affiliated(owned?) "VTT Technical Research Centre of Finland"

It is a govenrment owned non-profit company.

As one of its services it will independently verify your product/invention/whatever works as claimed (for a bunch of money).

https://www.vttresearch.com/en

Careful though, this test explicitly only tests the charge and discharge capabilities of the battery, not whether it's a solid state battery or not. According to ChatGPT, these results would in theory also be possible with a normal Li-ion battery. I am really hoping this is real though! And waiting for further tests.

I’ve been digging into the data (using Gemini and a few other sources). The claims behind https://idonutbelieve.com/ are pretty bold. I’d like to be optimistic, but I’m going to wait for more independent verification before drawing any conclusions.

> They also published the report here: https://pub-fee113bb711e441db5c353d2d31abbb3.r2.dev/VTT_CR_0...

That's the same link. Is there a way to attest that this is an official VTT report?

Fast charging, long life, low cost – pick two.

Actually, there are a bunch of other variables (energy density, stability, discharge current, etc. etc.), so the probability of a technology that improves one significantly without negatively affecting at least one other is vanishingly small. Hence the number of overhyped battery technologies that get reported but never productised.