Life indicator and lead-acid storage battery with life indicator
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United States of America Patent
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May 12, 1998
Grant Date -
N/A
app pub date -
Aug 23, 1995
filing date -
Aug 25, 1994
priority date (Note) -
Expired
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Abstract
The purpose of this invention is to provide a life indicator which can detect an occurrence of growth and obtain various information based on it. A life indicator of this invention having at least a sensor portion, a sending circuit, a receiving circuit and a light emitting diode. The sensor portion is adapted to be applied with a pressure based on an elongation of a positive plate directly or indirectly, so as to detect the applied pressure as a change of electric parameter.
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