Mr.Batt Replacement Battery for iRobot Roomba 500 600 700 800 900 Series Robot Vacuums High quality substitute for iRobot Xlife Extended Life battery with much lower price Compatible with all roomba 500, 600, 700, 800 900 series vacuum cleaning robot, incuding Roomba 500, 501, 510, 520, 521, 525, 530, 531, 532, 533, 535, 536, 540, 545, 550, 551, 552, 555, 560, 562, 563, 570, 580, 581, 585, 590, 595, 600, 610, 611, 614, 618, 620, 625, 627, 630, 650, 653, 654, 655, 660, 670, 700, 760, 761, 770, 780, 790, 800, 860, 870, 871, 880 900 980 and more 3500mAh high capacity, which will run your Roomba to work for 70 to 120 minutes after fully charged Package comes with 2 side brushes as a giveaway gift (Note: the brushes is only fit for roomba 500 600&700 series) Ni-MH rechargeable batteries will achieve best performance after 3-5 fully charge cycles