This fits your . Make sure this fits by entering your model number. 2-Pack Neato battery, Voltage:7.2V, Capacity:4000mAh, Battery Type:Ni-MH2-Pack Neato battery, Voltage:7.2V, Capacity:4000mAh, Battery Type:Ni-MH The 2 pcs of batteries ought to be used simultaneously. If one of them is…