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Apparatus for detecting a remaining capacity of a battery in a portable data transmission/reception device

  • US 5,608,324 A
  • Filed: 12/29/1994
  • Issued: 03/04/1997
  • Est. Priority Date: 12/29/1993
  • Status: Expired due to Fees
First Claim
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1. A signal processing system for detecting a remaining capacity of a battery, comprising:

  • measuring means for measuring a battery voltage;

    first detecting means for detecting a first time for said battery voltage to reach a predetermined level based on a pre-stored battery characteristic curve;

    second detecting means for detecting a second time for said battery voltage to reach a predetermined threshold voltage based on said pre-stored battery characteristic curve;

    estimating means for estimating a remaining time of a battery life of said battery based on said first time and said second time.

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