Replacement iRobot Roomba 500 Series Battery, Bristle Brush and Flexible Beater Brush, 3-Arm Side Brush - Kit Includes 1 Battery, 1 Bristle Brush and 1 Flexible Beater Brush, 1 3-Arm Side Brush Replacement iRobot Roomba 500 Series Battery, Bristle Brush and Flexible Beater Brush, 3-Arm Side Brush For Newer Version of the iRobot Roomba 500 Series Vacuum. Please check your Roomba to make sure you are purchasing the correct parts. 2000mAh, 14.4V, NICD One Year Warranty On Sale for a Limited Time!