RADIO COMMUNICATION UNIT, BATTERY UNIT, CHARGING DEVICE AND PORTABLE TERMINAL

摘要

PROBLEM TO BE SOLVED: To select an optimum operating mechanism corresponding to a use objective with a single telephone number as it is and to mutually refer to a mail log, a telephone directory, etc., among a plurality of general purpose information devices. SOLUTION: This radio communication unit 10 has a radio communication mechanism 10a capable of performing radio transmission and reception and a general purpose memory mechanism 10b storing files in the file format of a prescribed operating system. When, an external information device is connected to an external connector 13 with high versatility such as that of compact flash (registered trademark) type II, the external information device can perform communication control and read and write a file from/to the mechanism 10b.