NOVELTY - Lithium secondary battery comprises: cathode (21); anode (22); and electrolytic solution, where the electrolytic solution comprises a non-aqueous solvent, lithium(I) ion, at least one of inorganic anions having fluorine and element of groups 13-15, and at least one of organic anions containing substituted heterocyclic compounds (I)-(IV) and substituted ammonium compounds (V).    USE - The lithium secondary battery is useful in an electric power tool, electrical vehicle, electric power storage system (all claimed) and in other portable electronic devices e.g. video camera, digital still camera, mobile phone, notebook personal computer, cordless phone, headphone stereo, portable radio, portable television, personal digital assistant and portable lifestyle device (e.g. electric shaver).    ADVANTAGE - The lithium secondary battery: provides superior cycle, storage and load characteristics; and has improved chemical stability.    DETAILED DESCRIPTION - Lithium secondary battery comprises: cathode (21); anode (22); and electrolytic solution, where the electrolytic solution comprises a non-aqueous solvent, a lithium(I) ion, at least one of inorganic anions having fluorine and an element of groups 13-15, and at least one of organic anions comprising substituted heterocyclic compounds of formulae (I)-(IV) and substituted ammonium compounds of formula ((R12-N(X9)(X10)-R13)(n5-)) (V).    Either R1-R11 = H, -SO3- or organic group; or    R2R3, two of R4-R7 = ring;    X1-X10 = Lewis acidic ligand;    n1-n3, n5 = greater than or equal to 1;    n4 = greater than or equal to 2; and    R12, R13 = -SO3 or organic group.    INDEPENDENT CLAIMS are also included for:    (1) the electrolytic solution for lithium secondary battery;    (2) an electric power tool mounting the lithium secondary battery, and moving with the use of the lithium secondary battery as a power source;    (3) an electrical vehicle mounting the lithium secondary battery, and working with the use of the lithium secondary battery as a power source; and    (4) an electric power storage system mounting the lithium secondary battery, and using the lithium secondary battery as an electric power storage source.    DESCRIPTION OF DRAWING(S) - The figure illustrates a cross sectional view of a structure of a cylindrical type secondary battery including an electrolytic solution for a lithium secondary battery.    Insulating plate (12)    Electrode body (20)    Cathode (21)    Anode (22)    Separator (23)