Amazon.com: Kastar HHR-P104 Cordless Phone Battery, Ni-MH, 3.6 Volt, 1000mAh Ultra Hi-Capacity, Replacement for Panasonic HHR-P104 HHR-P104A and Sony MDR-RR800/900 Series Rechargeable Battery : Electronics
HHR-P104 Battery, Type 29, NI-MH Rechargeable Cordless Telephone Battery 3.6V 1000mAh, Replacement for Panasonic HHR-P104, Dantona, Energizer, GE (Detail Models in The Description) Standard Batteries & Chargers - Newegg.com
Amazon.com: HHR-P104 NI-MH Rechargeable Battery for Panasonic 3.6V 830mAh AAA Battery for Cordless Phones : Electronics