There is little doubt that Batteroo are incompetent, arrogant and 'incredibly' unlucky', but to call them scammers is a grey area... and this seems to be what they are playing.
There are a lot of words that fit better, and none of them are complimentary - but until a formal judgement drops - what they are doing is not illegal. It has very strong elements of questionable conduct, disrespect, dubious morals and other commercial no-no's... but they aren't in this for the long term business, so none of that matters.
Watch their videos again...it's obvious they never believed Batteriser works as claimed.
The only question is whether they ever intended to manufacture
anything. It now seems obvious they didn't.
(...and why would they waste money on manufacturing something that will cause them problems and make them a laughing stock, 100% guaranteed?)
There's hundreds of people out there waiting for Batterisers to arrive so they can test them, measure the efficiency, plot some curves, etc. I think the Batteriser Brothers decided to have the last laugh.