Battery pack and charging system for a portable electronic device

  • US 5,734,254 A
  • Filed: 12/06/1996
  • Issued: 03/31/1998
  • Est. Priority Date: 12/06/1996
  • Status: Expired due to Term
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First Claim
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1. A battery pack for use with a portable electronic device, comprising:

  • a housing;

    a battery mounted within said housing;

    a secondary transformer winding mounted within said housing for coupling an AC power signal;

    power converting means coupled between said battery and said secondary transformer winding for converting an AC power signal coupled by said secondary transformer winding into a DC power signal for charging said battery;

    a first communication port formed in an exterior of said housing; and

    means coupled to said battery and said first communication port for propagating signals indicative of battery charge status from said battery to said first communication port, said signals indicating at least the need for charging at a first level and a second level different from said first level, and for propagating the status signals outside of said battery pack.

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