Abstract: A structure for enhancing sidewall marking contrast and tire with the same are disclosed. The structure includes a plurality of structural units each having at least three quadrilaterals extending outward radiatively from a center thereof so that the structural unit form a code on a sidewall of a tire. The structure enhances sidewall marking contrast and increase observability of the code against the sidewall, thereby helping impress consumers with accentuated product distinctiveness and/or brand image.

Abstract: A structure for sharing batteries comprises a No. 1 battery converter, a No. 2 battery converter, and a No. 3 battery converter. The No. 3 battery converter may be inserted by a No. 4 battery so as to be used as a No. 3 battery. The No. 2 battery converter may be inserted by a No. 3 battery so as to be used as a No. 2 battery. The No. 2 battery converter may be inserted by a No. 1 battery so as to be used as a No. 1 battery. The No. 1 battery converter may be inserted by a No. 3 battery so as to be used as a No. 1 battery. Thus, the batteries can be used conveniently. Moreover, the No. 3 battery converter is inserted into the No. 2 battery converter, and then the No. 2 battery converter is inserted into the No. 1 battery converter so as to be easily stored and carried.