Facilitates the accumulation of zinc from the cytoplasm into intracellular vesicles, being a zinc-efflux transporter. Involved in zinc ion homeostasis and cellular distribution (By similarity). Contains a histidine-rich region, HXXXXXHNH-motif, which is a ligand for zinc. Belongs to the cation diffusion facilitator (CDF) transporter (TC 2.A.4) family. SLC30A subfamily.