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Batteries $35.99

Replacement NiMH Battery for iRobot Roomba 500 510 521 527 530 531 532 533 535 536 600 610 618 620 650 655 660 700 760 770 780 790 800 870 871 880 R3 Pet Series Blue 14.4V/4400mAh (Blue)

This ANCBD NiMH replacement battery is designed for many iRobot Roomba 500, 600, 700, 800, and R3 Pet models, using a 14.4V 4400mAh pack. Buyers report it can restore charging and extend run time, with a common caveat that fit or charging contacts may require careful installation.