The electrochemical characteristic of solutions of lithium benzolsulfonate in dimethylsulfoxide is considered. DTA/TGA is employed to analyze the thermal stability of salt. The conductivity of solutions was determined. So, for example, conductivity lithium benzolsulfonate in dimethylsulfoxide is 3.8 mSm/cm. The area electrochemical stability of solutions is in an interval 4.5-4.6 V. Electrochemical properties of lithium manganese oxide spinel in tested solutions were investigated. The charge-discharge capacity of lithium manganese oxide spinel is 65 mAh g(-1) (in interval of potentials from 3.2 to 4.4 V Li/Li+) and 190 mAh g(-1) (in interval of potentials from 1.8 to 4.0 V Li/Li+) for vanadium oxide (V). (c) 2007 Elsevier B.V. All rights reserved.