Entertainment system, cell charging system, entertainment apparatus, portable information terminal, and external cell charger

摘要

An entertainment apparatus for reading a program stored in an optical disk or the like as a detachably storage medium and executing a game based on the read program, charges a secondary cell accommodated in a portable information terminal. When the portable information terminal is connected to the entertainment apparatus, a charging circuit in the portable information terminal introduces a DC power supply from a charging power supply output terminal of the entertainment apparatus via a charging input terminal, increase the voltage of the DC power supply, and then charges the secondary cell in the portable information terminal with the DC power supply.