NOVELTY - The battery i.e. prismatic non-aqueous electrolyte secondary battery (10), has a positive electrode collector (16) electrically connected to a positive electrode plate and a negative electrode collector (18) electrically connected to a negative electrode plate. Each collector has a region formed parallel to a sealing body (13) and another region extended from the former region in a direction of a flat, wound electrode assembly (11) and connected to one of the plates. A set of edge portions is located outside than that of an inner surface of a tubular portion of a conductive element.    USE - Prismatic secondary battery i.e. prismatic non-aqueous electrolyte secondary battery, for use as a drive power source for a portable electronic equipment e.g. mobile phone or smart-phone, portable computer, personal digital assistant (PDA) and portable music player, an electric vehicle (EV) e.g. hybrid EV and plug-in HEV (PHEV), a stationary storage battery system for curbing output variation of photovoltaic power generation and wind power generation, and a grid power peak load shifting application for storing power at night and utilizing the power in daytime. Can also be used for a nickel-hydrogen secondary battery.    ADVANTAGE - The positive electrode collector has a set of rigid items that cannot be folded by a small force, where force acting on the former region is absorbed by the latter region and small force is rendered when the electrode assembly is shifted towards the sealing body due to vibration or falling, thus suppressing possibility of fracturing of a thin region and reducing influence on actuation of a pressure-sensitive current interruption mechanism, and hence achieving the battery with high safety and reliability.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of a prismatic non-aqueous electrolyte secondary battery.    Prismatic non-aqueous electrolyte secondary battery (10)    Flat, wound electrode assembly (11)    Sealing body (13)    Positive electrode collector (16)    Negative electrode collector (18)