HQRP Phone Battery for Panasonic KX-TG3520ME, KX-TG3521, KX-TG3521BX, KX-TG3521LA, KX-TG3521ME, KX-TG602x Series, KX-TG3521TW Cordless Telephone plus Coaster HQRP&reg; Rechargeable Battery plus HQRP&reg; Coaster; Battery Voltage: 3.6V; Capacity: 800 mAh; Ni-Mh; Keep in touch with friends and family and never miss a conversation; Compatible with Original Battery; 200 Days warranty!