The invention relates to a microporous membrane, which is provided with high safety even under a condition that the interior temperature of a battery becomes high, and which has high permeability and high mechanical strength at the same time. When three wirings are formed in parallel in the same wiring layer and the center wiring among them is shorter than the outer wirings, a projecting portion integrated into the outer wiring is formed utilizing a free space remaining on the extension of the center wiring. The electronic medical information card may be also be used as a form of identification, such as a driver’s license, an insurance card and so forth. A retainer is placed around the charge and affixed to the material such that the charge is at the proper stand off from the material.