Involved in cadmium/zinc transport. ATP + H2O + Zn(2+)(in) = ADP + H(+) + phosphate + Zn(2+)(out) ATP + Cd(2+)(in) + H2O = ADP + Cd(2+)(out) + H(+) + phosphate Belongs to the cation transport ATPase (P-type) (TC 3.A.3) family. Type IB subfamily.