Amazon.com: Replacement for iRobot Roomba 880 Battery and 6-Arm Side Brush - Kit Includes 1 Battery and 1 6-Arm Side Brush : Home & Kitchen
Amazon.com: iRobot Roomba Authentic Replacement Parts - XLife Extended Life Battery - Compatible with Roomba 400 600 700 800 Series Robots : Home & Kitchen
New 14.4V 9800mAh Replacement NI-Mh Battery for iRobot Roomba 500 600 700 800 Series for roomba 880 760 530 555 560 581 620 650 - AliExpress
Xtend Brand Replacement For Roomba 880 Battery - Newegg.com