Communication terminal apparatus and mobile telephone battery for supplying power thereto

摘要

A communication terminal apparatus according to the present invention comprises an attachment portion (recess) C to which a mobile telephone equipped with a data input/output interface DT is detachably coupled, the attachment portion having a data input/output interface CN to be connected to the data input/output interface DT when the mobile telephone M is attached, a communication control circuit built therein and adapted to transmit and receive data to and from an external terminal equipment through the mobile telephone M, and a small-sized display for displaying information corresponding to the received data. <IMAGE>