Housmile&trade; High-capacity, High-performance 14.4V 3000mAh NI-Cd Roomba battery Battery Type:Ni-Cd / Voltage:14.4V / Capacity:3000mAh Fully charge before use (at least 12 hours).Higher Capacity 3000mAh,it runs for well 1.5 to 3 hours with no problems after fully charge. Designed to meet or exceed performance of original battery Easy install and it fits perfectly.Keep your Roomba cleaning up all the cat hair, cat litter and whatever else was on the floor 30 Days Money Back