NOVELTY - A non-aqueous electrolyte secondary battery comprises electrode body provided with positive electrode and negative electrode and non-aqueous electrolyte which are accommodated in a predetermined battery case. The positive electrode is equipped with a positive electrode electrical power collector and a positive electrode compound material layer containing the positive electrode active material formed on electrical power collector by Karl Fischer method. The moisture content detected after 30-minute progress at 120 degrees C is less than or equal to 300 ppm.    USE - A non-aqueous electrolyte secondary battery for assembled battery used as driving power supply of vehicle (all claimed).    ADVANTAGE - The reliable non-aqueous electrolyte secondary battery can suppress the temperature rise during an internal short circuit, maintaining excellent battery characteristic.    DETAILED DESCRIPTION - A non-aqueous electrolyte secondary battery comprises electrode body provided with positive electrode and negative electrode and non-aqueous electrolyte which are accommodated in a predetermined battery case. The positive electrode is equipped with a positive electrode electrical power collector and a positive electrode compound material layer containing the positive electrode active material formed on electrical power collector by Karl Fischer method. The moisture content detected after 30-minute progress at 120 degrees C is less than or equal to 300 ppm, and the moisture content detected after 30-minute progress at 300 degrees C is 3000-10000 ppm. INDEPENDENT CLAIMS are included for:    (1) manufacture of non-aqueous electrolyte secondary battery; and    (2) assembled battery.    DESCRIPTION OF DRAWING(S) - The drawing shows a graph of the relationship between moisture content (ppm) detected with the heating temperature at 300 degree Celsius and the highest achieved temperature (degree Celsius) during nail penetration test. (Drawing includes non-English language text).