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Auxiliary battery sensor switch

  • US 5,859,481 A
  • Filed: 10/29/1996
  • Issued: 01/12/1999
  • Est. Priority Date: 10/29/1996
  • Status: Expired due to Term
First Claim
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1. An apparatus for switching between a main battery and a removable second battery in an electronic device, comprising:

  • means for interconnecting the main battery and the auxiliary battery to a power system of the electronic device;

    means for sensing a voltage drop initiated by connection of the removable auxiliary battery to the electronic device and for generating a voltage signal indicating a presence of the removable auxiliary battery; and

    a processor, responsive to the voltage signal generated by the means for sensing, for instructing the means for interconnecting to connect the auxiliary battery to system power and disconnect the main battery from system power.

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