| 摘要 |
A cellular phone battery charger includes a housing, a control circuit assembly mounted within the housing, the control circuit assembly having a power jack for obtaining power supply from a car battery by a cable or a city power supply outlet by a transformer, a coupling element mounted in the housing at the rear side to hold any of a variety of cellular phone connectors for connection to a particular cellular phone, and a batter holder mounted in the housing at the front side and electrically connected to the control circuit assembly for receiving a 9V alkaline battery for providing battery power supply to the connected cellular phone in an emergency case.
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