[JumpCrisscross]

> lithium ion is up to 265 Wh/kg and sodium ion has 160 Wh/kg

This is what less dense means.

[DLwdTxdU6smHQA]

sure. but it seems one third of the range seems too pessimistic according to those numbers.

[AstralStorm]

Sodium is about half the range with the older unimproved designs (new experimental ones are closer to parity with li-ion), it's better than the density number suggests because it's lower internal resistance - less steep discharge curve than li-ion.