We already have that, but probably not in the way you mean.
Lithium Ion batteries -- the current king of the hill -- are pretty much the same today as when they first came into use in the 1970s.
We've been seeing longer lifetimes and shorter charge times because device manufacturers can afford to throw in more hardware to control discharging and recharging.
I think he's saying we're already making massive advances in how to use batteries more efficiently.
What's missing seems to be advances in making batteries actually store more energy.
If I were a conspiracy nut, I'd suggest that perhaps companies have made massive advances in Batteries, but they would make far less money from them, so have hidden them in an underground lair.
Lithium Ion batteries -- the current king of the hill -- are pretty much the same today as when they first came into use in the 1970s.
We've been seeing longer lifetimes and shorter charge times because device manufacturers can afford to throw in more hardware to control discharging and recharging.