Does anyone know why my 960 never shows the battery icon as fully charged regardless of how long its on the charger? Is it time to replace the battery? I took the
Amazon.com: 1800mAh 1800LI Battery for iRobot Roomba 985/980/965/960/900/896/895/891/890/880/870/860/850/805/801/800/790/780/770/760/700/696/695/690/680/675/670/660/640/620/615/614/600/595/580/550/510 14.4V 26Wh : Home & Kitchen