and a second case half 41 are bent into two steps bending the rough surface portions 32 into two steps makes them longer than if the rough surface portions are straight as shown in fig1 the route for moisture to reach the inside of the cell 2 from outside the sealing member 4 is therefore longer further stopping leaking of electrolyte and entry of moisture from outside subjecting the rough surface portions 32 to a bending machining process further prevents the collector electrodes 3 and 30 from moving inside the first case half 40 and the second case half 41 when the collector electrodes 3 and 30 are bent along an external surface of the sealing member 4 this stabilizes the performance of the electric double layer capacitor 1 and makes it possible to boost yield the electric double layer capacitor 1 has excellent charge discharge behavior and can be applied to aqueous or non aqueous electrolyte batteries an electrolyte battery differs from the electric double layer capacitor only in that some of the component materials are different while the design and manufacturing method are substantively the same in the case of a non aqueous electrolyte battery the polarizable electrodes of the electric double layer capacitor are replaced with a positive active material body and a negative active material body for the positive active material body there are lithium cobaltate lithium manganate lithium nickelate and other materials achieved through pressure forming or sintering of a powder and for the negative active material body there are graphite based carbon materials coke based carbon materials and other materials achieved through pressure forming or sintering of a powder organic solvents in which a lithium salt has been dissolved are used for the electrolyte examples of.