Replacement battery fits 10 New Age compatible models. Specifications: 2000mAh, 6V, Ni-MH. Compatible with: Pocket Family, Physio Pro, Rehab, Ionotens, Uro, Ionovit and 4 more compatible models. Replaces: New Age BM663-1. New Age replacement battery designed for Medical devices. Simple plug-and-play replacement requiring no modification.