NOVELTY - A nonaqueous secondary battery consists of an electrode component (1) provided with a positive electrode, a negative electrode, and a separator, and an electrolyte solution. The actual operation time when it discharges at an electric current value (a(ItA)) until it is from the state of 100% charge depth to the state of 0% charge depth, is 75% or more with respect to electric current value exceeding 10ItA in the working hour rate calculated from the ratio with theoretical working time when discharged by electric current value (a).    USE - Nonaqueous secondary battery e.g. lithium ion secondary battery. Uses include but are not limited to mobile telephones, notebook personal computers, motor vehicles, motorbikes, and robots.    ADVANTAGE - The nonaqueous secondary battery has high capacity, excellent charge/discharge load characteristics at high current, and low direct current resistance.    DETAILED DESCRIPTION - A nonaqueous secondary battery consists of an electrode component provided with a positive electrode, a negative electrode, and a separator, and an electrolyte solution obtained dissolving a lithium salt in a nonaqueous solvent. The electrode component consists of positive-electrode current collection tabs (10) and negative-electrode current collection tabs (20) formed by winding stacked electrode component obtained by laminating the positive electrode and negative electrode interposing the separator, or the positive electrode and negative electrode in coil shape through the separator, and protruding from the positive electrode in one end surface of the electrode component or from negative electrode in one end surface of electrode component. The positive electrode has a positive-mix layer containing a positive-electrode active material and having a porosity of 25-35%. The negative electrode has a negative-mix layer containing a negative-electrode active material and having a porosity of 25-40%. The air permeability of separator is 250 sec/100 ml or less. The electrolyte solution contains dimethyl carbonate, ethyl methyl carbonate, and/or diethyl carbonate, and 10-35 vol.% ethylene carbonate as nonaqueous solvent. The D value represented by, D value=conductance (cSt) of nonaqueous solvent/electrical conductivity (mS/cm) of electrolyte solution, is 0.4 or less. The actual operation time when it discharges at an electric current value (a(ItA)) until it is from the state of 100% charge depth to the state of 0% charge depth, is 75% or more with respect to electric current value exceeding 10ItA in the working hour rate calculated from the ratio with theoretical working time when discharged by electric current value (a).    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of the wound electrode component of the nonaqueous secondary battery.    Electrode component (1)    Positive-electrode current collection tabs (10)    Negative-electrode current collection tabs (20)