Involved in heavy metal homeostasis. Probably exports nickel and cobalt ions out of the cell. ATP + H2O + Ni(2+)(out) = ADP + H(+) + Ni(2+)(in) + phosphate ATP + Co(2+)(out) + H2O = ADP + Co(2+)(in) + H(+) + phosphate By both Co(2+) and superoxide stress. Cells lacking this gene are hypersensitive to Co(2+) and Ni(2+) and accumulate these metals in the cytoplasm. Belongs to the cation transport ATPase (P-type) (TC 3.A.3) family. Type IB subfamily.