Battery pack for iRobot Roomba 520 (3000mAh, 14.4V, Ni MH)|Laptop Repair Components| - AliExpress
High Quality Hannets Battery I I Robot Roomba iRobot 520 Battery Pack Robot Vacuum Cleaner Storage Robot Replacement Part I Accessories 4500 mAh Battery Robot Roomba 520 Replacement Battery 14.4 V : Amazon.de: Home & Kitchen