ML-RMB500 replaces the original iRobot Roomba 80501 battery.
Mighty Max ML-RMB500 Brand new Battery Pack which is compatible with iRobot Roomba Advanced Power System APS Battery.. ML-RMB500 is an Ni-Cd Rechargeable battery that keeps Roomba running at peak performance, cleaning up your room in a single charge. Battery for iRobot 500 series 510,530,532,535,540,550,560,570 - 2PK The ML-RMB500 battery is fully compatible with all Roomba 500, 600, and 700 series.