NOVELTY - Battery comprises: positive electrode; negative electrode (1) in which negative electrode active material layer (1B) containing negative electrode active material containing natural graphite is formed on at least one surface of negative electrode collector (1A); and electrolyte, where thickness of negative electrode active material layer per one surface of negative electrode collector is 50-100 mu m.    USE - The battery is useful in: a battery pack; an electronic apparatus that receives supplying of power from the battery; an electric vehicle; an electricity storage apparatus that supplies power to an electronic apparatus connected to the battery; and an electric power system that receives supplying of power from the battery, or supplies power from a power generation device or a power grid to the battery (all claimed).    ADVANTAGE - The battery: has high cycle characteristics; and utilizes negative electrode having high stability to change over time in a cycle.    DETAILED DESCRIPTION - Battery comprises: a positive electrode; a negative electrode (1) in which a negative electrode active material layer (1B) containing a negative electrode active material containing natural graphite is formed on at least one surface of a negative electrode collector (1A); and an electrolyte, where a thickness of the negative electrode active material layer per one surface of the negative electrode collector is 50-100 mu m, and in the negative electrode active material layer from the negative electrode collector up to half of the thickness of the negative electrode active material layer in a surface direction of the negative electrode active material layer, an orientation degree A (peak intensity of carbon 002 face/peak intensity of carbon 110 face) that is a peak intensity ratio of a carbon 002 face and a carbon 110 face measured by an X-ray diffraction method is 100-500. INDEPENDENT CLAIMS are also included for:    (1) the negative electrode for a battery;    (2) a battery pack comprising the battery, a control unit that controls the battery, and an external body that contains the battery;    (3) an electric vehicle comprising the battery, a conversion apparatus that receives supplying of power from the battery to convert the received power into a driving force of the vehicle, and a control device that performs an information process for vehicle control based on information about the battery; and    (4) an electricity storage apparatus that includes the battery, and supplies power to an electronic apparatus connected to the battery.    DESCRIPTION OF DRAWING(S) - The figure shows a cross-sectional view of the negative electrode.    Negative electrode (1)    Negative electrode collector (1A)    Negative electrode active material layer (1B)    Inner layer (1C)    Surface layer (1D)