NOVELTY - A nonaqueous electrolyte secondary battery (10) has positive electrode containing lithium-containing transition metal complex oxide, negative electrode containing negative electrode active material, separator and nonaqueous electrolyte. Positive electrode contains lithium carbonate and lithium hydrogen carbonate. Total weight (A) of lithium carbonate and lithium hydrogen carbonate is 500-3000 ppm. Weight loss of positive electrode is 70% or less of total weight (A), and is 1500 ppm or less, when positive electrode is heated from 25 degrees C to 300 degrees C at heating rate of 5 degrees C/minute.    USE - Nonaqueous electrolyte secondary battery e.g. lithium-ion secondary battery. Uses include but are not limited to mobile telephone, notebook computer, electric screwdriver and electric motor vehicle.    ADVANTAGE - The nonaqueous electrolyte secondary battery has excellent storage characteristics, charging and discharging characteristics, and suppressed generation of gas.    DETAILED DESCRIPTION - A nonaqueous electrolyte secondary battery has positive electrode containing lithium-containing transition metal complex oxide as positive electrode active material, negative electrode containing negative electrode active material, separator arranged between positive electrode and negative electrode, and nonaqueous electrolyte. The positive electrode contains lithium carbonate and lithium hydrogen carbonate. The total weight (A) of lithium carbonate and lithium hydrogen carbonate is 500-3000 ppm. The weight loss of positive electrode is 70% or less of the total weight (A), and is 1500 ppm or less, when the positive electrode is heated from 25 degrees C to 300 degrees C at heating rate of 5 degrees C/minute. An INDEPENDENT CLAIM is included for manufacture of nonaqueous electrolyte secondary battery.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of the lithium-ion secondary battery.    Lithium-ion secondary battery (10)    Electrode group (11)    Battery case (12)    Insulator (15)    Sealing board (16)