HQRP Phone Battery for VTech i6775, i6777, i6778, i6783, i6785, i6787 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; 100% compatible with Original Battery; 200 Days warranty!