Tenergy 3500mAh NiMH Battery for iRobot Roomba

Battery is an exact replacement and compatible with these popular iRobot Roomba models: 500, 510, 530, 531, 532, 533, 535, 536, 540, 545, 550, 552, 560, 562, 570, 580, 595, 600, 620, 630, 650, 660, 700, 760, 770, 780, 790, 800, 870, 880Built-in PTC protection against short circuit and over-heating.Provides up to 100 minutes of run time. Greater use life than original Roomba batteries.Charges in 3 hours with APS chargerDimension: 5.7 x 2.2 x 2.5inches