A lithium-ion secondary battery of the present invention contains: a laminated electrode group formed of a rectangular positive electrode; a rectangular negative electrode; and a separator. Another object of the invention concerns a pharmaceutical composition comprising as active ingredients effective amounts of insulin and at least one compound of formula, together with pharmaceutically tolerable adjuvants, for the prophylactic or therapeutic treatment andor monitoring of physiological andor pathological conditions that are associated with insulin resistance. The plurality of inductors are magnetically coupled to each other. The optical absorption layer is formed on each of the non-projector side inclined planes of the base to absorb the light.