2 Pack iRobot Dual Mode Virtual Wall Barrier for Roomba 500/600/700/800/900 Series (Non-Retail Packaging) - Walmart.com
Amazon.com - iRobot Roomba 675 Robot Vacuum-Wi-Fi Connectivity, Works with Alexa, Good for Pet Hair, Carpets, Hard Floors, Self-Charging -
Cameron Sino 5200mAh Battery for iRobot Roomba 696,801,805,850,860,877,890,891,895,896,960,965,980,985 - AliExpress
Cameron Sino 4000mah Battery For Irobot Roomba 614,615,640,652,665,670,671,675,677,680,681,685,690,691,695,696,801,805,850,860 - Digital Batteries - AliExpress