NON-AQUEOUS ELECTROLYTE AND NON-AQUEOUS ELECTROLYTE BATTERY

Provided are: a non-aqueous electrolyte solution that can improve the charged storage characteristics of a non-aqueous electrolyte battery under a high-temperature environment while containing FSOLi; and a non-aqueous electrolyte battery having excellent charged storage characteristics under a high-temperature environment. The non-aqueous electrolyte solution contains FSOLi and a specific amount of ions of a specific metal element.