HQRP Rechargeable Battery Pack for UNIDEN GMR2099 GMR2099-2CK GMR635-2CK Two-Way Radio plus Coaster HQRP&reg; Replacement Battery plus HQRP&reg; Coaster; Battery Voltage: 4.8 Volt; Capacity: 700 mAh; Ni-Mh; Keep in touch with friends and family and never miss a conversation; 200 Days warranty!