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
Synergy Digital Vacuum Cleaner Battery, Compatible with iRobot Roomba 681 Vacuum Cleaner, (Li-ion, 14.4V, 4000mAh), Replacement for iRobot 2130LI, 4374392, 4376392, 4462425, 4502233 Battery - Walmart.com
iRobot Roomba 681 für nur € 459 | myRobotcenter.at