NOVELTY - A nonaqueous electrolyte battery (1) comprises an electrode group comprising a positive electrode comprising a positive electrode layer including 12-34 wt.% nickel and a negative electrode comprising a negative electrode layer including 39-51 wt.% titanium and a portion opposing the positive electrode layer, and a nonaqueous electrolyte held by the electrode group. The nonaqueous electrolyte battery satisfies specified relation.    USE - Nonaqueous electrolyte battery e.g. lithium-ion secondary battery, is used as power supply of electric vehicles e.g. hybrid electric vehicle and plug-in electric vehicle.    ADVANTAGE - The nonaqueous electrolyte battery has excellent capacity retention ratio after initial charging, and cycle characteristics. The degradation of positive electrode is prevented without raising the final discharge voltage of battery.    DETAILED DESCRIPTION - A nonaqueous electrolyte battery comprises an electrode group comprising a positive electrode comprising a positive electrode layer including 12-34 wt.% nickel and a negative electrode comprising a negative electrode layer including 39-51 wt.% titanium and a portion opposing the positive electrode layer, and a nonaqueous electrolyte held by the electrode group. The nonaqueous electrolyte battery satisfies the relation: -0.07 less than or equal to DA-DCx S/B less than or equal to 0.05 (I), where B (in Ah) is a discharge capacity, which is obtained by charging nonaqueous electrolyte battery to a maximum usage voltage with a constant current at a rate of 0.05 C at 25 degrees C, and then charging the nonaqueous electrolyte battery with a constant voltage till a current value reaches 0.01 C, and then discharging the nonaqueous electrolyte battery to a final discharge voltage at a rate of 0.05 C, S (in cm2) is an area of portion of negative electrode layer opposed to the positive electrode layer, DC (in mAh/cm2) is a discharge capacity of the positive electrode, DC is obtained by discharging the positive electrode from a fully charged state of 3 V at 25 degrees C and at a rate of 0.05 C and DA (in mAh/cm2) is a discharge capacity of negative electrode, and DA is obtained by discharging the negative electrode from a fully charged state of 2.0 V at 25 degrees C and at a rate of 0.05 C.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of nonaqueous electrolyte battery.    Nonaqueous electrolyte battery (1)    External component (11)    Metal-made container (11a)    Sealing component (11b)    Rectangular head (13a)