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Battery pack

  • US 5,796,238 A
  • Filed: 08/01/1994
  • Issued: 08/18/1998
  • Est. Priority Date: 10/13/1992
  • Status: Expired due to Term
First Claim
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1. A battery pack connected to a power source circuit and to external equipment comprising:

  • a battery unit charged by the power source circuit;

    detection means for detecting whether the external equipment is on or off and whether the power source circuit is on or off; and

    control means for controlling charging and discharging of the battery unit in response to the on or off status of both the external equipment and the power source circuit.

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