The present invention provides a cylindrical battery excellent in impact resistance. The elliptical optical module comprises a reflector intended to receive a light source. Therefore, users can access and manage the control management station and all its associated system through web browser on any other systems or devices. The outer edge of the metal layer is recessed from the outer edge of the metal layer by a width w, wherein w is a fraction of a the wavelength of the radiation. If not, all groups in are moved to a queue corresponding to the storage device at level 1 and an iterative process searches for a membership path from the element to any target group. In addition, each data item in the list comprises a set of additional fields.