Let the drill bit do the talking., page-20

Further to my previous -

This gives an indication how different the sulfate market is to the current quoted market and why the current price weakness does not concern me

A second Japanese trader, who was consulted by the LME on the sulfate premium contract recently, said battery-grade nickel sulfate was trading at $2,000-$4,000/mt plus LME nickel prices.
"The premium [calculated basis nickel content in the sulfate] is roughly one-fifth of the nickel cathode prices. The premium would be a reflection of supply and demand specific to nickel sulfate," he said.

https://www.spglobal.com/platts/en/...mium-contract-to-expand-battery-metal-futures