A battery, comprising: a rolled electrode assembly (A; 10) having a first electrode and a second electrode and a separator interposed therebetween, the first electrode having a first uncoated region (11; 210a) and the second electrode having a second uncoated region (12; 211a), the first and second uncoated regions (11; 210a, 12; 211a) being free of an active material, wherein the first uncoated region (11; 210a) and the second uncoated region (12; 211a) are adjacent to an edge of the first electrode and second electrode, respectively, extending along a winding direction of the rolled electrode assembly (A; 10), wherein the first and second uncoated regions (210a, 211a) extend beyond the separator at said edge; a battery can (20; 241) accommodating the electrode assembly (A; 10) and electrically connected to the second uncoated region (12; 211a), wherein the battery can (20; 241) comprises a first end face, a second end face and a cylindrical sidewall extending between the first end face and the second end face, wherein the second end face has an opening; a terminal electrically connected to the first uncoated region (11; 210a) and penetrating the first end face of the battery can (20; 241); a cap covering and sealing the opening of the second end face of the battery can (20; 241); a first current collector coupled to an end face of the electrode assembly, wherein the first current collector is coupled to the terminal so as to electrically connect between the first uncoated region of the electrode assembly and the terminal, wherein at least a part of a bottom surface of the terminal is formed as a flat portion parallel to an inner surface of the first end face of the battery can, wherein the first current collector is directly coupled to the flat portion of the terminal. a rolled electrode assembly (A; 10) having a first electrode and a second electrode and a separator interposed therebetween, the first electrode having a first uncoated region (11; 210a) and the second electrode having a second uncoated region (12; 211a), the first and second uncoated regions (11; 210a, 12; 211a) being free of an active material, wherein the first uncoated region (11; 210a) and the second uncoated region (12; 211a) are adjacent to an edge of the first electrode and second electrode, respectively, extending along a winding direction of the rolled electrode assembly (A; 10), wherein the first and second uncoated regions (210a, 211a) extend beyond the separator at said edge; a battery can (20; 241) accommodating the electrode assembly (A; 10) and electrically connected to the second uncoated region (12; 211a), wherein the battery can (20; 241) comprises a first end face, a second end face and a cylindrical sidewall extending between the first end face and the second end face, wherein the second end face has an opening; a terminal electrically connected to the first uncoated region (11; 210a) and penetrating the first end face of the battery can (20; 241); a cap covering and sealing the opening of the second end face of the battery can (20; 241); a first current collector coupled to an end face of the electrode assembly, wherein the first current collector is coupled to the terminal so as to electrically connect between the first uncoated region of the electrode assembly and the terminal, wherein at least a part of a bottom surface of the terminal is formed as a flat portion parallel to an inner surface of the first end face of the battery can, wherein the first current collector is directly coupled to the flat portion of the terminal.