HQRP Phone Battery for VTech 6897, DS4121-3, DS4121-4, DS4122-3, i6717, i6725 Cordless Telephone plus Coaster HQRP&reg; Rechargeable Battery plus HQRP&reg; Coaster; Battery Voltage: 3.6V; Capacity: 700 mAh; Ni-Mh; AAA Cells; Keep in touch with friends and family and never miss a conversation; Compatible with Original Battery; 200 Days warranty!