Photos and "looks pretty small" are not technical parameters that you pay tens of thousands for a lab to certify.

There are a bunch of cutting edge cell technologies out there right now with gangbusters specs but have some kind of fatal flaw.

If Donut was serious they would put the full specs of the tested cell in each report, so people could have higher confidence that each tested cell is the same chemistry. VTT would have no issue weighing and measuring each cell before and after testing.