| 摘要 |
The cordless telephone includes a fixed unit (1) and a portable unit (2) which are communicatable with each other over a radio link, the portable unit (2) comprises a rechargeable battery (215), and a battery saving circuit responsive to a control signal for interrupting power supply to predetermined sections of the portable unit (2). The fixed unit (1) comprises a charging circuit (115) for converting an AC voltage into a DC voltage to produce a charging voltage, a detector for, when the battery of the portable unit (2) is charged by the charging voltage, detecting that the battery is being charged and outputting a detect signal, and a supply circuit responsive to the detect signal for outputting the control signal and supplying the control signal to the portable unit together with the charging voltage. This cordless telephone saves a battery of a portable unit which is selectively chargeable by a fixed unit and a separate charger only when the portable unit is set in the fixed unit. Moreover, the charging time is reduced when the portable unit is charged by the fixed unit. |
