NOVELTY - A nonaqueous electrolyte secondary battery comprises a positive electrode that uses a positive electrode active material comprising lithium transition metal compound, where the lithium ions are insertable/separable; and a negative electrode that has 80-90% initial charge/discharge efficiency, where the battery is capable of charging/discharging at greater than or equal to 50 A current.    USE - A nonaqueous electrolyte secondary battery useful for electric vehicles and hybrid electric vehicles.    ADVANTAGE - The battery has excellent load characteristics and input/output characteristics that even if charge/discharge is performed under large current, i.e. greater than or equal to 50 A, increase of the IV resistance value at low depths of discharge is curbed. The lithium transition metal compound has low initial charge/discharge efficiency and is used as the positive electrode active material. The irreversible capacity of the negative electrode is large so that the positive electrode's high resistance regions will not be used during the terminal phase of discharge and the negative electrode's coating can be designed to be thin without making the negative electrode active material mass/positive electrode active material mass ratio large, thus the nonaqueous electrolyte secondary battery can be obtained having low IV resistance value even at low states of charge.    DETAILED DESCRIPTION - A nonaqueous electrolyte secondary battery comprises a positive electrode that uses a positive electrode active material comprising lithium transition metal compound or formula: Li1+aNixCoyMzO2, where the lithium ions are insertable/separable; and a negative electrode that has 80-90% initial charge/discharge efficiency, where the battery is capable of charging/discharging at greater than or equal to 50 A current.    M=Mn, Al, Ti, Zr, Nb, B, Mg and/or Mo;    a=0-0.3;    x=0.1-1;    y=0-0.5;    z=0-0.9; and    a+x+y+z=1.    DESCRIPTION OF DRAWING(S) - The drawing is a graph showing relation between states of charge and resistance values measured at 10-50 A in a nonaqueous electrolyte secondary batteries.