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Portable device and semiconductor device

  • US 20050017676A1
  • Filed: 09/22/2003
  • Published: 01/27/2005
  • Est. Priority Date: 09/18/2002
  • Status: Active Grant
First Claim
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1. A portable device connectable to a battery pack including a secondary battery, the portable device comprising:

  • a charging circuit for charging the secondary battery when the battery pack is connected to the portable device, the charging circuit including a charging terminal used to supply the secondary battery with charging current and a voltage detection terminal used to detect voltage of the secondary battery in the battery pack, the charging circuit stopping charging of the secondary battery if a voltage abnormality is detected at the voltage detection terminal.

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