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Systems and methods for determining and managing the power remaining in a handheld electronic device

  • US 7,921,309 B1
  • Filed: 06/14/2007
  • Issued: 04/05/2011
  • Est. Priority Date: 05/21/2007
  • Status: Active Grant
First Claim
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1. A method comprising:

  • measuring a battery voltage for a battery associated with an electronic device;

    determining a current drawn by components of the electronic device;

    determining a series resistance value for the electronic device; and

    utilizing the values for battery voltage, current drawn by the components, and the series resistance to display the power remaining in the battery on a display of the electronic device, wherein the power remaining in the battery (VBATT REAL) is determined by performing the following calculation;


    VBATT REAL=VBATT MEASURED+(Icompensated×

    R
    series),where VBATT MEASURED is the measured battery voltage, Icompensated is the current drawn by the components, and Rseries is the series resistance.

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