They'll have some next-gen battery stuff creeping out of the labs once they have got return on the investment they made to make all the lithium and cobalt batteries. Then there is the tin-foil-hat-wearer in me that watched "Tucker" (not Jenkins; the car man) and think the best tech has been buried next to the Ark of the Covenant for make benefit Illuminati etc.
But re: nuclear waste etc - maybe one of these solutions could be the next big thing. :
https://www.pocket-lint.com/gadgets/...r-over-the-air
Article mentions foldable batteries. Maybe they could make the shell/body parts actual lightweight batteries to get the mass down = increase efficiency.
But still wondering about grid capacity at the generating end of the line... Maybe we should ask a D5, they do seem jolly clever sorts.