TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Component: The lithium salt has a concentration of 0.5-2 M. The lithium salt comprises lithium phosphorus hexafluoride.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Compound: The monomer compound (I) is selected from 4 compounds such as R1-(A1)n-O-C(=X3)-C(=X4)-R2, R1-C(=X1-C(=X2)-(A1)n-O-(=X3)-C(=X4)-R2, R1-(A1)n-O-C(=O)-C(=CH2)-R2 and R1-C(=CH2)-C(=O)-(A1)n-O-C(=O)-C(=CH2)-R2. The monomer compound (I) is selected from poly(ethyleneglycol)methyl ether methacrylate and poly(ethyleneglycol)dimethacrylate. The monomer compound (I) is selected from -(OCH2CH2)8-O-C(=O)-C(CH2)-CH3, CH3-C(=CH2)-C=O)-(OCH2CH2)10-O-C(=O-C(=CH2)-CH3, -(OCH2CH2)8-O-C(=O)-C(=CH2) and/or CH2=CH-C(=O)-(OCH2CH2)10-O-C(=O)-CH=CH2. Preferred Components: The organic solvent (S2) comprises monomer compound (I) (0.5-20, preferably 1-15) wt.%. The high dielectric constant solvent is selected from ethylene carbonate, propylene carbonate, butylene carbonate and/or gamma butyrolactone (preferably ethylene carbonate). The low boiling point solvent is selected from dimethyl carbonate, ethylmethyl carbonate, diethyl carbonate, dipropyl carbonate, dimethoxyethane, diethoxyethane and/or fatty acid ester derivatives (preferably diethyl carbonate). Preferred Definitions:    A1=oxyalkylene group selected from oxyethylene, oxypropylene or oxybutylene.    EXAMPLE - An organic electrolyte solution (test) comprising poly(ethyleneglycol)methyl ether methacrylate of formula -(OCH2CH2)8-O-C(=O)-C(=CH2)-CH3 (5 wt.%), ethylene carbonate (30 vol.%), diethyl carbonate (70 vol.%) and LiN(C2F2SO2)2 (BETI) as a lithium salt was prepared. A control organic electrolyte solution was prepared similarly, except poly(ethyleneglycol)methyl ether methacrylate of formula -(OCH2CH2)8-O-C(=O)-C(=CH2)-CH3 was not used. The test/control organic electrolyte solutions were then used for making lithium battery. The test/control lithium batteries were then evaluated for charge/discharge efficiency and capacity retention ratio. The results for test/control lithium batteries were: charge/discharge efficiency (%) = 99.6/98.9, and capacity retention ratio (%) = 70.08/59.2, respectively. The results showed that the test battery exhibited excellent charge/discharge efficiency and capacity retention ratio as compared to the control battery.