NOVELTY - The device (100) has two storage cells (106, 110) each positioned in a housing (104), where the storage cells are electrically connected in series with one another. A sealing conductor (108) establishes the series connection between the storage cells, where the sealing conductor comprises a flat end wall (122) and a cylindrical side wall (124). A sealing rim or flange (126) is extended from the side wall opposite the flat end wall. The side wall surrounds a portion one of the storage cells. A sealing insulator (112) is coupled to a portion of the sealing conductor.    USE - Coil cell type electric double layer capacitor (EDLC) device i.e. electrochemical supercapacitor, for use in a slim electronic device for applications. Uses include but are not limited to memory backup applications to bridge short power interruptions, battery management applications to improve current handling of a battery or to provide a current boost on high load demands, fuel cell applications to enhance peak-load performance, regenerative braking applications on vehicles, and vehicle starting systems.    ADVANTAGE - The EDLC device has higher operating voltage capabilities, thus allowing for a reduction in the number of devices required for certain installations, leading to space savings and simplified energy storage circuitry. The device can be used in place of two single cell EDLC devices with a much smaller package size than two single cell devices each contained in separate housings, thus reducing size of the circuit board to provide even smaller electronic devices, reducing costs of providing energy storage systems, and increasing reliability of the energy storage system.    DETAILED DESCRIPTION - The sealing conductor is fabricated from a metal, a conductive polymer and a conductive composite material. The sealing insulator is fabricated from one of metal oxide and polymer. An INDEPENDENT CLAIM is also included for a method for manufacturing an EDLC device.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of an EDLC device.    EDLC device (100)    Housing (104)    Storage cells (106, 110)    Sealing conductor (108)    Sealing insulator (112)    Flat end wall (122)    Cylindrical side wall (124)    Sealing rim or flange (126)