HQRP 1600mAh Ni-MH Battery for Icom IC-A21 Two Way Radio Replacement plus Coaster HQRP&reg; Two-way Radio Ni-MH Battery plus HQRP&reg; Coaster; Capacity: 1600mAh High Capacity; Voltage: 8.4v; Chemistry: Ni-MH; The battery is completely compatible with batteries of smaller capacity; 100% compatible with Original Battery and Charger devices; 200 days warranty.