14.4V For iRobot Roomba 5.0Ah Battery 500 700 600 800 650 595 780 620 660 Series | eBay
Roomba 14.4V 4.5Ah Battery for iRobot 500 600 650 700 800 595 620 660 780 Series | eBay
Do the grime and markings on the battery terminals mean it's probably time to replace it or do they just need cleaning? Roomba is currently not taking a charge. Older Roomba 780. :