US Patent 7306878 Battery device and electronic apparatus

A battery apparatus and electronic equipment, in which the battery apparatus having a characteristic compatible with the electronic equipment can be suitably attached to the electronic equipment, and which are advantageous in miniaturizing themselves and improving their operability. In a battery apparatus (100), an identification section (18) of the battery apparatus (100) serves to identify a characteristic of the battery apparatus (100), and which is provided on an end surface (1022) and on both sides of a battery-side terminal (14) in the width direction (W) of the battery apparatus (100). The identification section (18) is configured with identification recesses (1802), (1804) formed in a manner open to the end surface (1022), and at least one of the positions, cross-sectional shapes, and lengths on the end surface (1022) of the identification recesses (1802), (1804) is formed on the basis of the characteristic of the battery apparatus. In the identification (18), the cross-sectional shape and length of the identification recess (1802) is formed on the basis of the characteristic of the battery apparatus (100).