NOVELTY - A nonaqueous electrolyte secondary battery consists of positive electrode (1) provided with positive mix layer containing positive electrode active material, conductive support agent and binder provided on surfaces of collector, negative electrode (2), separator (3) and nonaqueous electrolyte. A portion of the positive electrode active material contains lithium nickel cobalt manganese complex oxide (I). The titration value of hydrochloric acid used for neutralizing alkali in the positive mix layer is 14 ml or less.    USE - Nonaqueous electrolyte secondary battery used as power supply. Uses include but are not limited to personal computer, mobile telephone, electric vehicle, handheld game machine and personal digital assistant.    ADVANTAGE - The nonaqueous electrolyte secondary battery with high safety, high temperature storage characteristics, cycle characteristics and high capacity is provided.    DETAILED DESCRIPTION - A nonaqueous electrolyte secondary battery consists of positive electrode provided with positive mix layer containing positive electrode active material, conductive support agent and binder provided on surfaces of collector, negative electrode, separator and nonaqueous electrolyte. A portion of the positive electrode active material contains lithium nickel cobalt manganese complex oxide of formula: LiNixCo1-x-y-zMnyM1zO2 (I). The titration value of hydrochloric acid used for neutralizing alkali in the positive mix layer is 14 ml or less. A polymer which can dissolve in solvent other than polyvinylidene fluoride is contained in a portion of the binder, in the ratio of 0.1-0.5 part mass with respect to 100 parts mass of the positive electrode active material. The ratio of cyclohexyl benzene in the solvent is 0.2-1.5 %mass with respect to the whole quantity of the electrolyte. The positive mix layer (20.0 g) purified by ion exchanging method and having pH of 7 is sealed in a container filled with nitrogen gas. The positive mix layer is immersed in 100 ml water with electroconductivity of 2 mu S/cm or less, and stirred with magnetic stirrer for 60 minutes. The supernatant liquid (25.0 ml) obtained by filtering the container is mixed with methyl orange solution (0.1 %mass) to prepare a sample solution. Intermittent titration of the sample solution is carried out with 0.02 mol/L of hydrochloric acid. The quantity of hydrochloric acid added to the sample with respect to the time taken for the color change of the sample solution from yellow to orange is used as the titration value of hydrochloric acid required for the neutralization of the alkali in the positive mix layer.    M1=magnesium, aluminum, titanium, strontium, zirconium, niobium, silver or barium;    x=0.5-0.9;    y=0.005-0.3;and    z=0.003-0.05.    An INDEPENDENT CLAIM is included for manufacture of the nonaqueous electrolyte secondary battery.    DESCRIPTION OF DRAWING(S) - The drawings show the top view and fragmentary longitudinal cross-sectional view of the nonaqueous electrolyte secondary battery.    Positive electrode (1)    Negative electrode (2)    Separator (3)    Armored can (4)    Flat wound electrode material (6)