NOVELTY - A non-aqueous electrolyte battery comprises positive electrode (5), negative electrode (6) containing negative electrode current collector (6a) which has aluminum (alloy) and layer (6b) which has negative electrode active material formed on negative electrode current collector, separator (7) provided between positive electrode and negative electrode, copper-containing component (8) which contains copper (copper alloy) and is electrically connected to negative electrode current collector to prevent from over-discharge, and non-aqueous electrolyte.    USE - A non-aqueous electrolyte battery for battery pack (claimed). Uses include but not limited to power sources for digital camera or cars, such as two- to four-wheel hybrid electric cars, two- to four-wheel electric cars, and assist bicycles.    ADVANTAGE - The non-aqueous electrolyte battery can suppress temperature increase upon over-discharge and achieve high safety even when circuit for preventing over-discharge is not used because the battery includes copper-containing component which is electrically connected to negative electrode current collector to prevent from or control over-discharge, providing non-aqueous electrolyte battery with excellent input/output performance and excellent charge and discharge cycle performance. When aluminum alloy is used, weldability of positive and negative electrode leads with the copper-containing component is improved, and breakage of wire due to vibration or shock can be suppressed, and high reliability can be secured. In a case of a battery module, increased resistance in the connection between batteries, caused by corrosion in a high temperature and high humidity atmosphere, can be suppressed, and the resistance can be kept low, and the batteries and the battery module can exhibit a high output.    DESCRIPTION OF DRAWING(S) - The drawing shows an enlarged cross-sectional diagram of an A part of the electrode group of the battery.    Positive electrode (5)    Negative electrode (6)    Negative electrode current collector (6a)    Negative-electrode-active-material-containing layer (6b)    Separator (7)    Copper-containing component (8)