3500 mAh Ni-Mh 14.4 V APS Battery for iRobot Roomba 581 Vacuum Cleaner Replacement – See The Description Below For Series Compatible * * * FREE SHIPPING IN EU * *: Amazon.de: Home & Kitchen
Battery For iRobot Roomba 500 series 545 552 562 580 581 582 585 595 - MightyMaxBattery
Roomba 581 Battery
14.4V 6.8Ah For iRobot ROOMBA 581 (LI-ION) Battery - Walmart.com