Powerextra 3800mAh Roomba Battery Compatible with Irobot Roomba 500 510 530 532 535 540 545 550 552 560 562 570 580 581 582 585 595 600 620 630 650 660 700 760 770 780 790 800 870 880 R3 80501(2 pack) Battery Type:Ni-MH / Voltage:14.4V / Capacity:Upgraded 3800mAh. High quality, high capacity battery for longer running time.convenient to use This battery widely compatible with iRobot Roomba 500 600 700 800&900 Series. This battery is also fully compatible with Discovery Series, Create Models and Dirt Dog Models Package contains four side brush and four screw as a giveaway gift. ( Note: The 2*side brush fit for Roomba 500 600 & 700 series. The other 2*side brush fit for Roomba 800 & 900 Series.) All Powerextra products come with a 30-day money back and a 12-month limited seller's guarantee against manufacturer defects from date of purchase, and 24 hours' friendly customer service!!