Masione 2500mah Ni-Cad Replacement Battery for iRobot Roomba 500 600 700 800 900 R3 Series, fits Roomba 510 530 531 532 535 536 540 550 560 570 650 760 770 780 790 880 980 Series Vacuum Cleaner 14.4 Volts Masione Brand New Ni-Cad Replacement Battery, High quality, High capacity battery for longer working time. Convenient to use With 2500mah fully Capacity, No Fake High Capacity Lable, this battery can run your Roomba for about 40 minutes Easy to charge and connect APS battery compatible with all Roomba 500 600 700 800 series Keep your Roomba cleaning up all the cat hair, cat litter and whatever else was on the floor All batteries are passed strict quality assurance procedures such as CE, RoHS, UL, FCC certifications.