| 摘要 |
PROBLEM TO BE SOLVED: To minimize the damage when a cellular phone is stolen or the like by limiting the use time of the cellular phone after the cellular phone is removed from the charger after charging. SOLUTION: When the user of the cellular phone connects a charge terminal T1 of the cellular phone 1 to a charge connection terminal T2 of the charger 2, a charge section 11 of the cellular telephone starts to be charged from a charging circuit 21 of the charger. The cellular phone comprises a timer 13 for clocking the use time of the cellular phone, and a cellular phone CPU 10 for controlling a cellular phone function circuit 14 of a call or the like when clocking is completed by the timer. The charger comprises a connection detection circuit 22 for detecting the connection state when the charger is connected to the cellular phone, and a transmission circuit 23 for transmitting a connection signal by the control of a charger CPU 20 when connection is detected by the connection detection circuit.
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