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External battery pack apparatus

  • US 20040227489A1
  • Filed: 06/23/2004
  • Published: 11/18/2004
  • Est. Priority Date: 12/28/2001
  • Status: Abandoned Application
First Claim
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1. An external battery pack apparatus for providing a portable appliance with a power-supply voltage, comprising:

  • an adapter for containing a power-supply terminal and output voltage setting terminals, and programming an output voltage by short-circuiting or open-circuiting at least one pair among the above terminals;

    a cable connected to the adapter; and

    a main body for containing a battery, a charging controller for charging the battery, and an output controller for performing a DC-to-DC conversion on a voltage charged in the battery and outputting the DC-to-DC converted voltage to the adapter via the cable, detecting a programming status of the adapter, and varying an output voltage in response to the detected programming status.

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