iRobot Roomba 500 Replacement Battery HIGH CAPACITY NiMh - 2 YEAR WARRANTY - Walmart.com
New 14.4v 3000mah I7 Battery Replacement For Irobot Roomba E & I Series I7+ E5 7150 7550 I3 3150 I3+ 3550 I4 4150 Part - Vacuum Cleaner Parts - AliExpress
Amazon.com: 14.4V 4.5Ah Replacement Battery for Roomba Compatible with Roomba Battery R3 500 600 700 800 900 Series 500 510 531 535 540 550 552 560 570 580 595 620 650 660 700 760 770 780 790 800 900 with brush : Home & Kitchen