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Microprocessor controlled battery reconditioner for portable radio transceivers

  • US 4,734,635 A
  • Filed: 09/26/1986
  • Issued: 03/29/1988
  • Est. Priority Date: 09/26/1986
  • Status: Expired due to Fees
First Claim
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1. A portable radio, comprising in combination:

  • a rechargeable battery producing a predetermined nominal voltage and having a predetermined minimum voltage when deep discharged;

    a keyboard having a plurality of actuable keys;

    a radio receiver;

    a radio transmitter; and

    battery reconditioning circuitry comprising;

    detecting means coupled to the battery for sensing the magnitude of the battery voltage;

    switching means for applying the battery voltage to at least a portion of one of the radio receiver and radio transmitter in response to an enable signal;

    control means coupled to said detecting means, switching means and keyboard for producing the enable signal in response to actuation of a pre-selected sequence of keys, said control means comparing the sensed magnitude of the battery voltage to a predetermined minimum voltage magnitude and disabling said switching means when the sensed magnitude of the battery voltage is substantially the same as the predetermined minimum voltage magnitude, whereby the battery is deep discharged to the predetermined minimum voltage.

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