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Battery backup for vehicle emergency communicator

  • US 7,956,490 B2
  • Filed: 06/16/2010
  • Issued: 06/07/2011
  • Est. Priority Date: 09/16/2009
  • Status: Active Grant
First Claim
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1. A battery backup for a vehicle emergency communicator, comprising:

  • a backup battery;

    at least one diode adapted for connection between a main vehicle battery and the backup battery, the at least one diode allowing the backup battery to be charged when the main vehicle battery is operational, the at least one diode isolating power from the backup battery when the main vehicle battery is non-operational, the backup battery selectively being the only source of power connected to the vehicle emergency communicator; and

    a charging relay adapted for being energized by the main vehicle battery, the charging relay having electrical contacts connecting said backup battery to power the vehicle emergency communicator when the charging relay is no longer energized due to failure of the main vehicle battery.

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