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Amazon.com: Powerextra 4.0Ah 14.4V Replacement Battery Compatible with Roomba R3 500 600 700 800 900 Series 500 510 531 535 540 550 552 560 570 580 595 620 650 660 700 760 770 780 790 800 870 900 : Home & Kitchen
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Fix iRobot Roomba vacuum Error 11, Error 26 or Error 30 E-series, i-series or J-series - how to fix - YouTube
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