14.8V 4.4Ah Li-ion Replacement Battery for iRobot Roomba

Battery Capacity: 4400mAH                                                        Battery Voltage: 14.8 V  Battery Type: Li-ion                                                                      Color: Blue Dimension: 140*46.5*55mm/5.5*1.83*2.17inch                           Battery Weight: only 470g Cells: Brand cells   Widely compatible with : For iRobot Roomba 500 series :500  510  520  521  525 530  531  532  535  540  550  555  560  562  563  570  580  581  590 For iRobot Roomba 600 series :600  610  625 For iRobot Roomba 700 series :760  770  780  R3 For iRobot Roomba 800 series :870  871  880  1.Extended capacity of 4400mAh,Made of best Brand Cells,provides up to 2.5-3.3 hours running time. 2.Uniquely designed for Irobot Roomba 500 600 700 800 Series vacuum cleaner. 3.Battery weight:only 470g,higher capacity,life time up to 1000 cycles (vs. 300 cycles of the original Ni-MH battery). 4.No memory effect + Low rate of self-discharge (1% per month). 5.Built-in smart charging circui