Life safety device with automatic battery discharge at the end of life
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United States of America Patent
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Nov 8, 2011
Grant Date -
Apr 22, 2010
app pub date -
Oct 16, 2008
filing date -
Oct 16, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
When a rechargeable battery of a life safety device reaches its end of life, the life safety device provides an audible signal indicating that replacement is required. When the device is disconnected from line power, the rechargeable battery still contains a significant amount of energy. The device automatically begins controlled discharge the battery until the stored energy has been reduced to a safe level for disposal of the life safety device and its battery.
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Family
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