Lithium Li-Ion 4400mAh Replacement Battery for iRobot Roomba 500, 600, 700, 800 Series and Scooba 450, High Capacity 4.4Ah, SUPER LONG-LIFE (800 CYCLE TIMES) by CyberTech, With Free Bonus Side Brush, 880 510 530 532 535 540 545 550 552 560 562 570 580 581 582 585 595 600 620 630 650 660 700 760 770 780 790 800 870 R3 80501 4419696 Review