Well, we found out about Diamond Mine in that it's Roderick Strong, Tyler Rust and Hideki Suzuki and Malcolm Bivens is the group's manager/mouthpiece. What's sort of strange is that Suzuki was signed by WWE a few months back as a trainer and coach, so him being an active participant is surprising. I don't really know much of anything about the guy but maybe the NXT honchos were so impressed with his work that he'd be a boon to the group. At age 41, he's one of the oldest wrestlers I've seen come through NXT so I highly doubt he'll ever be on Raw or SmackDown.
As for the battery charging, I have no clue nor have I even read any stories suggesting who it is. This has me thinking that maybe whatever this thing is about is known to only a very small handful of people.