The purpose of the present invention is to provide a nonaqueous-electrolyte battery that exhibits high charge/discharge performance, i.e. high input/output performance, over a long period of time. This nonaqueous-electrolyte battery, in which a nonaqueous electrolyte and a group of electricity-generation elements that each have a positive electrode, a negative electrode, and a separator that isolates said positive electrode and negative electrode are sealed inside a battery case, is characterized in that the negative electrodes contain graphite having an edge/surface ratio (fe), as defined by the following equation, of 0.03-0.1. fe=(2B/La+T/d002)/(2B/d100+T/d002). In this equation, B represents the mean grain diameter of the graphite, T represents the grain thickness, La represents the a-axis crystallite size, d002 represents the spacing between (002) planes, and d100 represents the spacing between (100) planes.