[oblio]

I think we've had, what? 3 major battery techs in 150 years? The first one, then lead acid, now lithium ion.

It's a hard problem.

50% extra energy density with the same performance characteristics as lithium ion otherwise would probably level us up as a civilization.

[maxerickson]

Lithium-ion is 50% better than it used to be (in terms of energy/mass, it's done better than that for energy/volume).

A problem is that lithium is more or less the best choice for materials, and we've been pouring resources into developing it.

[jodrellblank]

Don’t forget the frog battery https://en.wikipedia.org/wiki/Frog_battery

And quite a lot of others: https://en.wikipedia.org/wiki/List_of_battery_types

[oblio]

Adding clauses: mainstream rechargeable battery techs.