Battery type: Li-Ion - no memory-effect Capacity: 4000 mAh Voltage: 14.4 V Energy: 57.6 Wh Colour: black Number of cells: 4 Weight: 416 g Compatible with the following device models: iRobot Roomba 621 iRobot Roomba 614 iRobot Roomba 605 iRobot Roomba 611 iRobot Roomba 618 iRobot Roomba 610 iRobot Roomba 612 iRobot Roomba 616 iRobot Roomba 620 iRobot Roomba 615 To ensure compatibility, please check to see whether the battery you are currently using is listed below.