NOVELTY - A non-aqueous electrolyte solution comprises electrolyte, non-aqueous solvent, and components (A-D). The component (A) contains phenyl carbonate compound (1), and cyclic carbonate having ethylenic unsaturated bond, cyclic carbonate, mono-fluorophosphate, and/or difluoro phosphate. The component (B) contains phenyl carbonate compound (2). The component (C) contains diphenyl carbonate, and vinylene carbonate, cyclic carbonate compound, mono-fluorophosphate and/or difluoro phosphate. The component (D) contains phosphoric-acid ester compound and carboxylate ester compound.    USE - Non-aqueous electrolyte solution used for battery (claimed) for mobile telephone, notebook personal computer and motor vehicle.    ADVANTAGE - The non-aqueous electrolyte solution provides compact battery with high capacitance and excellent high-temperature storing characteristics and cycling characteristics.    DETAILED DESCRIPTION - A non-aqueous electrolyte solution comprises electrolyte, non-aqueous solvent, and components (A-D). The component (A) contains phenyl carbonate compound of formula (1), and cyclic carbonate having ethylenic unsaturated bond, cyclic carbonate having fluorine, mono-fluorophosphate, and/or difluoro phosphate. The component (B) contains phenyl carbonate compound of formula (2). The component (C) contains diphenyl carbonate, and vinylene carbonate, cyclic carbonate compound having fluorine, mono-fluorophosphate and/or difluoro phosphate. The component (D) contains phosphoric-acid ester compound and carboxylate ester compound having phenyl group substituted by optionally substituted 4C or more alkyl group. The ratio of diphenyl carbonate in non-aqueous electrolyte solution is 0.001-5 weight%. The total content of vinylene carbonate, cyclic carbonate compound having fluorine, mono-fluorophosphate and difluoro phosphate is 0.001-20 weight%. The non-aqueous solvent contains ethylene carbonate and dialkyl carbonate. The ratio of ethylene carbonate with respect to the total amount of ethylene carbonate and dialkyl carbonate is 5-50 volume%.    R1 = 1-12C alkyl, halo or phenyl;    R2-R6 = H or halo;    R7 = 1-12C alkyl optionally having halogen atom, and phenyl;and    R8-R12 = H, halo, 1-12C ether or 1-12C alkyl optionally having halogen atom.    At least one of R8-R12 is 2-12C alkyl group optionally having halogen atom.    An INDEPENDENT CLAIM is included for non-aqueous electrolyte solution battery, which comprises non-aqueous electrolyte solution, dischargable negative electrode, positive electrode, and non-aqueous electrolyte solution.