A battery is disclosed and includes a positive electrode assembly including a positive electrode substrate, a positive electrode active material coated at one surface of the positive electrode substrate, and a positive electrode tab attached to the one surface of the positive electrode substrate; a negative electrode assembly including a negative electrode substrate, a negative electrode active material coated at one surface of the negative electrode substrate, and a negative electrode tab attached to the one surface of the negative electrode substrate; and a separator located between the positive electrode assembly and the negative electrode assembly, wherein in a first area facing the positive electrode tab at the one surface of the negative electrode substrate, the negative electrode active material is not coated, and in a second area adjacent to the first area in a length direction of the positive electrode tab at the one surface of the negative electrode substrate, the negative electrode active material is coated.