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Portable battery charger for a mobile device

  • US 7,268,519 B2
  • Filed: 05/22/2003
  • Issued: 09/11/2007
  • Est. Priority Date: 11/06/2000
  • Status: Expired due to Term
First Claim
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1. A communication apparatus, comprising:

  • a mobile communication device having a rechargeable battery; and

    a portable battery recharging unit detachably coupled to the mobile communication device for recharging the rechargeable battery, the portable battery recharging unit comprising;

    a housing;

    a battery fitted within the housing;

    a switching regulator coupled to the battery for generating a charging output; and

    a charging interface coupling the charging output from the switching regulator to the rechargeable battery within the mobile communication device in order to recharge the rechargeable battery;

    wherein the housing of the portable battery recharging unit includes a battery cover which covers a battery compartment that holds the battery, wherein the battery is removable from the portable battery recharging unit by detaching the battery cover from the housing; and

    wherein the switching regulator is configured to operate in two modes, a current limiting mode and a constant voltage mode.

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