Cystine/H(+) symporter that mediates export of cystine, the oxidized dimer of cysteine, from lysosomes (By similarity). May play a role in the degradation of engulfed apoptotic cells (PubMed:18351800). H(+)(out) + L-cystine(out) = H(+)(in) + L-cystine(in) During degradation of apoptotic cells when lysosomes fuse to phagosomes, located to phagosomal surfaces until the cell corpse is fully degraded. Belongs to the cystinosin family.