TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Method: The electrolyte film is prepared by wet process which includes dispensing the inorganic absorbent in the polymer binder and solvent, and exchanging the solvent with a non-solvent for the polymer binder. The solid electrolyte is prepared by activation procedure in which the ion conductive liquid electrolyte is absorbed into the film. The ion conductive liquid electrolyte is obtained by dissolving lithium salts of in organic solvents so that the lithium salts have a concentration of 0.5-20M. The cathode and anode are prepared in separate way to the film. The polymer binder is used in the cathode and/or anode is the same or compatible with the polymer binder in the film. An additive used in the cathode and/or anode is mixture of the absorbents used in the film.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Materials: The solvent for the polymer binder is a mixture of N-methylpyrrolidine, dimethylformamide, dimethylacetamide, tetrahydrofuran, acetonitrile, cyclohexanone, chloroform, dichloromethane, hexamethylphosphoramide, dimethylsulfoxide, acetone and/or dioxane. The non-solvent for the polymer binders is a mixture of water, ethanol, ethylene glycol, acetone, dichloromethane, ethylacetate, butanol, pentanol, hexanol and/or ether. The organic solvents are ethylene carbonate (EC), propylene carbonate, butylene carbonate, dimethyl carbonate (DMC), diethylcarbonate, ethylmethylcarbonate, gamma-butyrolactone, 1,3-dioxane, tetrahydrofuran, 2-methyltetrahydrofuran, dimethylsulfoxide, sulfolane, N,N-dimethylformamide, diglyme, triglyme or tetraglyme.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Materials: The inorganic absorbent is a mixture of mineral particles having phyllosilicate structures (e.g. clay, paragonite, montmorillonite or mica); synthetic oxide compounds particles (e.g. zeolite, porous silica or porous alumina, or magnesium oxide); and/or mesoporous molecular sieves having 2-30 micron pore diameter made of oxide compounds or polymers. The lithium salts are lithium perchlorate (LiClO4), lithium tetrafluoroborate (LiBF4), lithium hexafluorophosphate (LiPF6), lithium hexafluoroarsenate (LiAsF6), lithium thiocyanate (LiSCN), lithium trifluoromethane sulfonate (LiCF3SO3), lithium bis(trifluoromethane sulfonyl) imide (LiN(CF3SO2)) or lithium mithide (LiC(CF3SO2)).    TECHNOLOGY FOCUS - POLYMERS - Preferred Polymer: A polymer binder of the absorbent is mixture of polyvinylidene fluoride, copolymers or vinylidene fluoride and hexafluoropropylene, copolymers of vinylidene fluoride and maleic anhydride, polyvinylchloride, polymethylmethacrylate, polymethacrylate, cellulose triacetate, polyurethane, polysulfone, polyether, polyethylene, polypropylene, polyethylene oxide, polyisobutylene, polybutylidene, polyvinylalcohol, polyacrylonitrile, polyimide, polyvinyl formal, acrylonitrile butadiene rubber, ethylene-propylene-diene-monomer, tetraethyleneglycol diacrylate, polydimethylsiloxane, polycarbonate and silicon polymer and/or their copolymers. EXAMPLE - The porous solid electrolyte was determined for its electrochemical stability using linear sweep voltammetry. The electrochemical voltage applied in the linear sweep voltammetry was from an open circuit to 5.5V and the scan rate was 10 mV/sec. Sample A-D were used in the test. Samples A-C contained water as non-solvents; 88.5% (A), 85.1% (B), and 79.8% (C) absorbent contents; 0.26 g (A), 0.29 g (B), and 0.38 g (C) polyvinylidene fluoride; EC/DMC 1M LiPF6 liquid electrolyte; and all had good mechanical strength. Sample D contained 88.5% absorbent content, 0.26 g polyurethane as binder material, EC/DMC 1M LiPF6 liquid electrolyte and had good mechanical strength. The solid electrolyte was stable until 4.8V in the electrochemical aspect. The synthetic oxide absorbents were more stable than natural mineral absorbents.