Sony BP-T31 Cordless Phone Rechargeable Battery For use with Sony SPP-A9171, SPP-S9000, SPP-S9001, SPP-S9101 and SPP-A2470 Cordless Phones For use with Sony SPP-A9171, SPP-S9000, SPP-S9001, SPP-S9101 and SPP-A2470 Cordless Phones DC 3.6 Volts, 600 mAh Capacity, Nickel Cadmium (Ni-Cd) Type