THEMONG Buy New Extra Accessory for iRobot Roomba 675 655 645 Series Replacement Kit Parts Set Filter Side Brush Bristle Brush Flexible Brush Tires Front Caster Wheel;

Directly from the manufacturer. Factory price.
Compatible iRobot Roomba models:
iRobot Roomba 510 iRobot Roomba 530 iRobot Roomba 531 iRobot Roomba 532 iRobot Roomba 533 iRobot Roomba 535
iRobot Roomba 536 iRobot Roomba 540 iRobot Roomba 545 iRobot Roomba 550 iRobot Roomba 552 iRobot Roomba 560
iRobot Roomba 562 iRobot Roomba 570 iRobot Roomba 580 iRobot Roomba 581 iRobot Roomba 585 iRobot Roomba 595
iRobot Roomba iRobot Roomba 600 610 iRobot Roomba 620 iRobot Roomba 630 iRobot Roomba 650 iRobot Roomba 660
iRobot Roomba iRobot Roomba 760 iRobot Roomba 770 iRobot Roomba 780 iRobot Roomba 700 790
iRobot Roomba iRobot Roomba serie 800 870 880 de iRobot Roomba
iRobot Roomba 900 iRobot Roomba 980

This replacement battery is designed for iRobot Roomba series 500 vacumm cleaner, which is a kind of recharageable Ni-MH battery, can be carried anywhere at any time, convenient to use. And it is without memory effect. It can be loaded or unloaded as necessary without loss of capacity.