A battery can 2 is composed of a can body 3 having a concave portion 31 for accommodating an electrode body 5, and a metal cover 4 for sealing an opening end of the concave portion 31 of the can body 3. The ink chamber includes sidewalls formed to a predetermined depth from the front surface of the substrate for defining side surfaces of the ink chamber and a bottom wall formed parallel to the front surface of the substrate at the predetermined depth from the front surface of the substrate for defining a bottom surface of the ink chamber. A gap created between the outer peripheral surface of the weight member and the inner wall surface of the hollow portion is filled with a visco-elastic body. The editor interface is displayed within a browser substantially simultaneously with the website. For enhancing the user-definability of the apparatus, it is preferred that a user interface is provided through which the user can define one or more communication parameters. The fastening element, which could be a screw, is disposed in the tangential bore in engagement with the ring member and extends across the ring spacing.