A flexible circuit board is provided to prevent unsuccessful interconnection between the wirings of the flexible circuit board and the output terminals of a semiconductor chip, the flexible circuit board having a plurality of sections of wirings of different sizes, each section including a pattern of wirings of the same size. An anchor delivery system is provided which houses one or more uniquely configured expandable anchors which are connected to the medical implant device. Also, the mask can be easily carried and kept. An output of the first and second input transistors is coupled to inputs of the first and second follower transistors. Such electrodes are useful as electrodes in batteries, such as Ni-MH batteries, Ni\u2014Cd batteries, Ni\u2014Zn batteries and Ni\u2014Fe batteries.