PURPOSE: To improve both the discharge characteristics at a high rate and discharge characteristics at a low temperature of a non-aqueous electrolyte cell by using a mixed solute of lithium perchlorate and tetrabutyl ammonium chloride as the solute for an electrolyte.

CONSTITUTION: A mixed solute of lithium perchlorate and tetrabutyl ammonium chloride is used as a solute for a non-aqueous electrolyte to assemble a non- aqueous electrolyte cell. The density of this mixed solute is made about 1.0mol/l. By using this mixed solute, the non-aqueous electrolyte cell can obtain excellent characteristics for both the discharge at a high rate and discharge at a low temperature due to the multiplicative effect.