[gvb]

The graph doesn't diverge from the "standard" lithium battery pack for 3-4 years. The buyers won't know if they are "snake oil salesmen" for a relatively long time.

Even if you do accelerated cycles on the battery, it will be a while (1 year? 2 years?) before you can say "snake oil" and it will be around two times longer before you can confirm the claim.

It isn't a halting problem, but in terms of the pace of electronics, it's close in that by the time you can confirm it isn't snake oil, it may well be irrelevant.