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Lithium-ion batteries is just one, albeit very popular, option.

You have batteries that do not use lithium at all.

The battery market is going to see several different technologies for different use cases.

That's true however there aren't currently any other viable batteries chemistries with the density offered by lithium based chemistries.

Well considering CATL is launching commercial sodium-ion batteries. I would tend to think otherwise.

There's also other interesting investments in air breathing cathode batteries.