TECHNOLOGY FOCUS - ELECTRONICS - Preferred Component: A non-conductive polymer housing is configured to retain an electrolyte in electrolytic communication with the polarizable electrodes. The end plates are thermally bonded to the electrodes by injection molding, rotational molding, low pressure molding, pressure molding, mirror welding, roll welding, hot-roll welding, co-extrusion, ultrasonic welding, orbital welding, vibrational welding, laser/ infrared/photonic welding, spin welding, or electric resistance welding.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Component: The carbonaceous material is carbon black, graphite, carbon powder, carbon fiber, carbon nanotubes, carbon fibulae, or activated carbon. Preferred Composition: The carbonaceous material comprises 20-45 wt.% of the conductive end plate composition.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Component: The carbonaceous material is carbon black, graphite, carbon powder, carbon fiber, carbon nanotubes, carbon fibulae, or activated carbon. Preferred Composition: The carbonaceous material comprises 20-45 wt.% of the conductive end plate composition.    TECHNOLOGY FOCUS - POLYMERS - Preferred Component: The non-conductive polymer housing comprises polyolefin polymer(s) or co-polymers. The polyolefin polymers or co-polymers are polyethylene, polypropylene, ethylene-octene, ethylene-propylene rubber, ethylene-propylene vulcanizates, or ultra high molecular weight polyethylene. The non-conductive polymer housing comprises polymer(s) or co-polymers from polyvinylidene chloride (PVC), polyetheretherketone (PEEK), butyl rubber, styrene-butadiene-rubber, polymethyl methacrylate, polytetrafluoroethylene (PTFE), an ethylene-tetrafluoroethylene copolymer (ETFE), a chlorotrifluoroethylethylene polymer (PCTFE), a vinylidene fluoride copolymer (PVDF), a tetrafluoroethylene-hexafluoropropylene copolymer (FEP), a tetrafluoroethylene-perfluoroalkylvinyl ether copolymer (PFA), furfural, phenolic, or epoxides. The conductive polymer endplate comprises two or more polymers of different melt temperatures. It is a blend, mixture, or copolymer between polypropylene and polyethylene. Only the polyethylene melts. The conductive polymer endplate is a blend, mixture or copolymer between polypropylene, or polyethylene and ethylene-propylene rubber, or ethylene-propylene diene rubber, which may be vulcanized or cross-linked to provide better chemical resistance and strength. The polymer is a polyolefin polymer or co-polymer comprising functional group-containing monomers from carboxylic acids, dicarboxylic acids, or their derivatives. It is a polyolefin polymer or co-polymer comprising halogenated functionalities or halogen-containing polyolefinic monomers or polymers, where improving the polymer adhesion to the electrode. The conductive polymer endplate comprises a conductive substance blended with a polymer. The conductive substance comprises a carbonaceous material. Preferred Ratio: The mass ratio of the two is 97:3-15:85.