HQRP Phone Battery for AT&T/Lucent E5643, E5643B, E5644B, E5654B, E5655 Cordless Telephone plus Coaster HQRP&reg; Rechargeable Battery plus HQRP&reg; Coaster; Battery Voltage: 3.6V; Capacity: 700 mAh; Ni-Mh; Keep in touch with friends and family and never miss a conversation; Compatible with Original Battery; 200 Days warranty!