NOVELTY - A nonaqueous electrolyte battery comprises a positive electrode (1); a negative electrode (2) containing an active material having a lithium ion insertion potential of greater than or equal to0.4V (vs Li/Li+), a conductive agent containing a carbonaceous material, and a current collector supporting the active material and the conductive agent; and a nonaqueous electrolyte containing first sultones having an unsaturated hydrocarbon group.    USE - In battery pack (claimed).    ADVANTAGE - The nonaqueous electrolyte battery is reduced in the generation of gas, has a long cycle life and is excellent in large-current performance. The battery is excellent in large current performance and cycle performance.    DETAILED DESCRIPTION - A nonaqueous electrolyte battery comprises a positive electrode (1); a negative electrode (2) containing an active material having a lithium ion insertion potential of greater than or equal to0.4V (vs Li/Li+), a conductive agent containing a carbonaceous material, and a current collector supporting the active material and the conductive agent; and a nonaqueous electrolyte containing first sultones having an unsaturated hydrocarbon group, where a diameter distribution of pores of the negative electrode when measured by mercury porosimetry has a first peak having a mode diameter of 0.01-0.2 microns and second peak having a mode diameter of 0.003-0.02 microns, and a volume of pores having a diameter of 0.01-0.2 microns and a volume of pores having a diameter of 0.003-0.02 microns, which are measured by the mercury porosimetry, are 0.05-0.5 ml and 0.0001-0.02 ml, respectively, per g of the negative electrode excluding the current collector. INDEPENDENT CLAIMS are included for the following:    (1) a battery pack comprising the nonaqueous electrolyte battery; and    (2) a vehicle comprising the battery pack.    DESCRIPTION OF DRAWING(S) - The figure shows a sectional view of a flat type nonaqueous electrolyte battery.    Positive electrode terminal (1)    Negative electrode terminal (2)    Wound electrode group (6)    Case. (7)