[doikor]

> 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