HQRP High Capacity 1500mAh / 10.8Wh Ni-MH Rechargeable Battery for iRobot Scooba 230 200 Floor Washing Robot replacement plus Coaster HQRP&reg; High Capacity Battery plus HQRP&reg; Coaster; Battery Type: Ni-MH Rechargeable Battery Pack; Capacity: 1500mAh; Volt: 7.2V; 10% more capacity and extra power compared to the standard battery! 100 days warranty!