Real step forward especially with regards to not having to use rare expensive and polluting minerals and metals. A company from Sweden called Northvolt have just developed a Sodium ion battery with a similar charge density to the top Lithium ion ones and it’s ready for mass production.
The great thing about Battery tech is that there are so many different options being explored. A Ferrous Oxide battery developed by Zeeker, part of Geeley recently attained 648 miles on a single charge, which in itself is impressive but even more so is the fact that it was attained in temperatures between -2 and -12 centigrade.
We live in Interesting times.