What's the next battery technology after lithium-ion?

TL;DRLithium-ion hasn't hit its ceiling. Steady improvement of about 8% a year compounds into big cost cuts.
Elon Musk: Inventing the Future with the Los Angeles World Affairs Council @ 34:00

TL;DRLithium-ion hasn't hit its ceiling. Steady improvement of about 8% a year compounds into big cost cuts.
Elon Musk: Inventing the Future with the Los Angeles World Affairs Council @ 34:00