ExpertPower 14.4v 3500mAh NiMh Extended Battery for iRobot Roomba 500, 600, 700, 800 Series; 880 510 530 532 535 540 545 550 552 560 562 570 580 581 585 595 600 620 650 660 700 760 780 790 800 870 R3 Brand New | Ni-Mh | 14.4 Volts | 3500 mAh | Yellow ExpertPower batteries are made with the highest quality materials. ExpertPower products are tested to match and/or exceed specifications of OEM products. Products trademarked ExpertPower are marketed and sold exclusively by ExpertPower. 1 Year Warranty