Project Description


The majority of the hand held power tool market has migrated to Lithium ION, “L-ION” battery technologies and require a ‘smart’ trigger switch to enhance charge life, tool performance, battery protection and battery life. Defond has developed a trigger switch series that provides built in L-ION controls.


  • Integrating battery management sensors into the switch mechanism
  • Adding new features to the switch including
    • Step-less variable speed control
    • Reversing option
    • Brake and auxiliary light output options

Services Performed

  • Mechanical design
  • PCB/Hardware design
  • Battery management design
  • Molding
  • Stamping


  • EGJ Series switch includes:
    • Built in battery management
    • Step-less variable speed control
    • Reversing option
    • Brake control option
    • Auxiliary output signal option for LED or remote control monitoring
  • Compact size
  • Cost competitive for the functions performed

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