Replacement iRobot Roomba 572 Pet Series (AeroVac) Battery and 3-Arm Side Brush - Kit Includes 1 Battery and 1 3-Arm Side Brush Replacement iRobot Roomba 780 Battery and 3-Arm Side Brush For Newer Version of the Roomba 572 Pet Series (AeroVac). 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!