Battery tester upgrade using software key

  • US 7,012,433 B2
  • Filed: 09/18/2002
  • Issued: 03/14/2006
  • Est. Priority Date: 09/18/2002
  • Status: Active Grant
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First Claim
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1. An electronic battery tester, comprising:

  • first and second connectors configured to electrically couple to terminals of a battery;

    a microprocessor configured to test the battery using the first and second connectors;

    a memory containing a first set of locked instructions for the microprocessor;

    an input configured to receive a first software unlocking key; and

    the microprocessor configured to execute the first set of locked instructions in response to the first software unlocking key corresponding to a first predetermined software unlocking key, wherein the first set of locked instructions are a first set of battery testing instructions.

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