Nickel Sulfate Might Be Easily Within ReachAwaruite come in 2 forms:
Ni2Fe
Ni3Fe
Sulfuric acid is H2SO4
Ni2Fe + 3(H2SO4) -> 2(NiSO4) + FeSO4 + 3H2
Ni3Fe + 4(H2SO4) -> 3(NiSO4) + FeSO4 + 4H2
Then precipitate the iron sulfate to get rid of it
Then add water to hydrate the nickel sulfate
NiSO4 +6(H2O) -> NiSO4(H2O)6
I think this is the form needed for battery production.