Quasi-permanent battery for hearing aids
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United States of America Patent
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Issued Date -
Oct 15, 2009
app pub date -
Apr 9, 2008
filing date -
Apr 9, 2008
priority date (Note) -
Abandoned
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Abstract
A hearing aid includes a secondary battery and means for identifying the kind of battery for charging. After the battery is identified, an appropriate algorithm for charging the battery is selected and used for charging the battery. Primary batteries are not charged. The hearing aid also includes a voltage reduction circuit for supplying a constant voltage to circuitry within the hearing aid. The battery preferably has an energy density greater than 500 watt-hours per liter.
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