| 摘要 |
The present invention relates to a power supply interface for a mobile telephone powered from a battery whose terminal voltage is greater than the maximum supply voltage of the mobile telephone. The invention is characterized by a resistive cable (4) which is wound helically and which is connected between an electrical contact (5) on a voltage supply source and an electronic unit mounted in a housing (6). The electronic unit includes a voltage regulator which delivers a controlled output voltage. The resistance of the cable shall exhibit certain conditions and shall have a length which is adapted to the resistance such that when at maximum load the mobile telephone will only be heated to a moderate extent; a maximum temperature of about 50 DEG C., preferably 35 DEG C., is intended.
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