is an insulating state however the insulating tape 14 that is coupled with the surface of the electrode assembly 10 may be damaged due to external impact heat generated from the inside of the case 25 and the like therefore when the insulating tape 14 is damaged due to external impact heat and the like such that the first electrode 11 is electrically connected with the case 25 via the residual electrolytic solution e that is stagnated in the bottom of the case 25 disposed at a side facing the cap plate 20 a current path is formed between the first electrode 11 and the second electrode 12 to cause a short circuit within the case 25 the absorption member 90 according to an exemplary embodiment of the present invention may prevent or substantially prevent a short circuit from occurring within the case 25 due to the residual electrolytic solution e as illustrated in fig5 when the case 25 is rotated clockwise or counterclockwise or inverted such that the cap plate 20 faces a gravity direction or in other words a normal to the cap plate 20 pointing away from the case 25 is parallel to the direction of gravity the residual electrolytic solution e remaining in the case 25 is absorbed in the absorption member 90 disposed in the case 25 the absorption member 90 according to an exemplary embodiment of the present invention is made of a material that may appropriately absorb the residual electrolytic solution e consequently according to an exemplary embodiment of the present invention since the residual electrolytic solution e is absorbed in the absorption member 90 it is possible to prevent or substantially prevent a short circuit from occurring within the.