Not everything in batteries is Li-Ion or LiFePO. There are a range of new technologies under active development, some more advanced than others. Applications vary, from small portable to large grid-scale.
This technlogy (Sodium) looks promising and seems to be closest to market of new 'general purpose' (well, sort of) battery tech:
Why the Biggest Battery Company is Betting Against Lithium
Also,
Undecided is a fairly interesting channel and has less hype and bias than some of the others although, IMHO, it's not completely immune.
And see if you can count the puns ...
