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A/C - D/C power system with internal fuel cell

  • US 20050040785A1
  • Filed: 08/19/2003
  • Published: 02/24/2005
  • Est. Priority Date: 10/01/2002
  • Status: Active Grant
First Claim
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1. A method for charging and maintaining the operation of a battery-powered electronic application device, including the steps of:

  • (A) providing a controllable switching device;

    (B) providing a plurality of power sources each coupled to said application device via said controllable switching device, said plurality of power sources including at least two of the following;

    (i) an AC power source;

    (ii) a DC power source;

    (iii) a direct oxidation fuel cell; and

    (iv) a rechargeable battery; and

    (C) switching said controllable switching device to select between said plurality of power sources to provide operating power to said application device or to charge said rechargeable battery.

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