NOVELTY - Secondary battery comprises a cathode, an anode, and an electrolytic solution, where the anode includes a carbon material and styrene-butadiene rubber, and the electrolytic solution includes an unsaturated cyclic ester carbonate (I).    USE - The secondary battery is useful as lithium-ion secondary battery in: a battery pack; an electric vehicle; an electric power storage system; an electric power tool; and an electronic apparatus, which is useful as an electric power supply source (all claimed) such as a video camcoder, a digital still camera, a mobile phone, a notebook personal computer, a cordless phone, a headphone stereo, a portable radio, a portable television, and a personal digital assistant; and portable home appliances such as electric shavers, memory devices such as backup power supplies and memory cards, where the electric power tool is electric drill and electric saw, the battery packs are useful as power supplies of notebook personal computers, medical electronic units such as pacemakers and hearing aids, and the electric vehicles include electric cars (including hybrid vehicles), and electric energy storage system such as household battery systems.    ADVANTAGE - The secondary battery has superior battery capacity, cycle characteristics and storage characteristics.    DETAILED DESCRIPTION - Secondary battery comprises a cathode, an anode, and an electrolytic solution, where the anode includes a carbon material and styrene-butadiene rubber and the electrolytic solution includes an unsaturated cyclic ester carbonate of formula (I).    X = a divalent group in which m-number of divalent group of formula (a) and n-number of divalent group of formula (b) are bonded in any order;    R1-R4 = H, halo, preferably F, Cl, B or I, a monovalent hydrocarbon group, a monovalent halogenated hydrocarbon group, a monovalent oxygen-containing hydrocarbon group, or a monovalent halogenated oxygen-containing hydrocarbon group, where any two or more of R1-R4 are bonded to one another;    m = greater than or equal to 1; and    n= greater than or equal to 0.    INDEPENDENT CLAIMS are included for:    (1) a battery pack comprising the secondary battery, a control section controlling a usage state of the secondary battery, and a switch section switching the usage state of the secondary battery according to an instruction from the control section;    (2) an electric vehicle comprising the secondary battery, a conversion section converting electric power supplied from the secondary battery into drive power, a drive section operating according to the drive power, and the control section;    (3) an electric power storage system comprising the secondary battery, one or more electric devices supplied with electric power from the secondary battery, and the control section controlling the supplying of the electric power from the secondary battery to the electric devices; and    (4) an electric power tool comprising the secondary battery, and a movable section receiving electric power from the secondary battery.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a secondary battery (cylindrical type).    Battery can (11)    Insulating plates (12, 13)    Battery cover (14)    Safety valve mechanism (15)    Positive temperature coefficient device. (16)