The invention provides a non-aqueous secondary battery having positive and negative electrodes and non-aqueous electrolyte containing lithium salt which has an energy capacity of 30 Wh or more, a volume energy density of 180 Whl or higher, which battery has a flat shape and is superior in heat radiation characteristic, used safely and particularly preferably used for a energy storage system. The invention comprises a primary structure with a volume that expands into adjacently located unused space, such as an aircraft’s main entry cross-aisleway. Refractive surfaces on the transition area redirect the light into the panel member. A cargo bed divider is movable between a stowed state wherein the cargo bed divider is stowed in a cargo bed divider cavity defined in the tailgate and a dividing state wherein the cargo bed divider has a first end removably secured to the first sidewall and a second end removably secured to second sidewall to divide the bed floor into distinct storage areas. The disk identified in the completion array is used as the master disk for the particular address identified. The pack includes a flexible film material wherein the body of the pack has a first thickness and overlapping portions of film material providing the orifice have second and third thicknesses.