System for indicating a low battery condition
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United States of America Patent
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-
Nov 15, 1994
Issued Date -
N/A
app pub date -
Apr 12, 1993
filing date -
Feb 14, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A system for accurately predicting impending battery failure in battery powered electronic and electrical devices. The system continually monitors changes in battery voltage responsive to load changes and calculates a ratio of the change in voltage to the change in load. When the ratio exceeds a certain threshold value, indicating that the impedance of the battery has risen to near its final value, a user warning indication is generated.
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