| 摘要 |
PURPOSE: A cellular phone battery charger alarm is provided to create charge complete sound when a cellular phone is charged by mounting an alarm circuit to a cellular phone battery charger. CONSTITUTION: An alarm circuit is included within a cellular phone battery charger. The alarm circuit is connected to the cellular phone battery charger. The alarm circuit is composed of an LED and a buzzer. The LED is turned when a cellular phone completely is charged. The buzzer operates when the cellular phone completely is charged. The LED and the buzzer operate at the same time.
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