This really sounds like pure snake oil: a ton of buzzwords, diamonds and nukes to make it sound exciting and cool, an unbelievably long period of power release

This really sounds like pure snake oil: a ton of buzzwords, diamonds and nukes to make it sound exciting and cool, an unbelievably long period of power release (how can they even test that their claim is true ?). I'd pass until one of those devices has been tested by a slew of independent labs and confirmed to at least deliver the claimed power density.