Patent ID: 7395088

Claim:
A mobile phone which is able to be carried by an authorized user for performing various electronic information processes, comprising: a main body; a battery pack detachably attached to the main body for supplying power thereto, said battery pack having an input/output section integrally formed therewith for performing a user verification function using biometric information of a user of the mobile phone input via the input/output section, wherein said user verification function verifies the identity of an authorized user of the mobile phone based on the inputted biometric information; and an optical communications means for transferring signals relating to the inputted biometric information between said main body and the battery pack, said optical communication means comprising: a light emitting module provided for the battery pack, and a light receiving module provided for the main body and opposing the light emitting module while the battery pack is attached to the main body, to directly receive light emitted from the light emitting module, wherein, to transfer signals relating to the inputted biometric information from the battery pack and the main body, the light emitting module emits light and the light receiving module directly receives the emitted light while the battery pack is attached to the main body.