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
Best Buy: UltraLast Nickel Metal Hydride Batteries for Panasonic HHR-P104 (2-Pack) BATT-104-2
Amazon.com: HHR-P104 NI-MH Rechargeable Battery for Panasonic 3.6V 830mAh AAA Battery for Cordless Phones : Electronics
Amazon.com: HHR-P104 NI-MH Rechargeable Battery for Panasonic 3.6V 830mAh AAA Battery for Cordless Phones : Electronics