NOVELTY - A nonaqueous electrolyte battery (1) comprises a positive electrode, a negative electrode including a current collector and a negative electrode layer supported by the current collector, and a nonaqueous electrolyte. The negative electrode layer has a porous structure. The pore diameter distribution of the negative electrode as determined by a mercury porosimetry includes peak (I) having a mode diameter of 0.01-0.2 mu m and peak (II) having a mode diameter of 0.003-0.02 mu m.    USE - Nonaqueous electrolyte battery is used in battery packs used in vehicles (both claimed).    ADVANTAGE - The nonaqueous electrolyte battery has excellent charge-discharge cycle life, reliability, and output characteristics, large current characteristics, and high capacity, and is lightweight. The impregnation capability of negative electrode with the electrolyte is improved.    DETAILED DESCRIPTION - A nonaqueous electrolyte battery comprises a positive electrode, a negative electrode including a current collector and a negative electrode layer supported by the current collector, and a nonaqueous electrolyte. The positive electrode comprises manganese dioxide, iron oxide, copper oxide, nickel oxide, lithium-manganese composite oxide, lithium-nickel composite oxide, lithium-cobalt composite oxide, lithium-nickel-cobalt composite oxide, lithium-manganese-cobalt composite oxide, spinel type lithium-manganese-nickel composite oxide, lithium phosphorus oxide having an olivine structure, iron sulfate, vanadium oxide, and lithium-nickel-cobalt-manganese composite oxide. The negative electrode layer contains a lithium-titanium oxide and has a porous structure. The pore diameter distribution of the negative electrode as determined by a mercury porosimetry includes peak (I) having a mode diameter of 0.01-0.2 mu m and peak (II) having a mode diameter of 0.003-0.02 mu m. The volume of pores having a diameter of 0.01-0.2 mu m as determined by mercury porosimetry is 0.05-0.5 mL/g of negative electrode excluding the weight of current collector. The volume of pores having a diameter of 0.003-0.02 mu m is 0.0001-0.02 mL/g of negative electrode excluding the weight of current collector. An INDEPENDENT CLAIM is included for battery pack.    DESCRIPTION OF DRAWING(S) - The drawing shows an oblique view of a dismantled battery pack.    Nonaqueous electrolyte battery (1)    Unit cells (21)    Battery module (22)    Printed wiring board (24)    Wiring (30)