HQRP 3300mAh APS Battery for iROBOT Roomba 531 / 533 / 536 / 537 / 551 / 561 / 563 / 564 / 571 / 577 / 578 / 600 / 611 / 790 [Vacuum Cleaning Robot] Replacement plus HQRP Coaster
Replacement APS Battery Compatible with iROBOT Roomba 531 / 533 / 536 / 537 / 551 / 561 / 563 / 564 / 571 / 577 / 578 / 600 / 611 / 790. Up to 2.5 hours cleaning time!