YANHUA Vehicle Power Supply ADC Adapter

What it does

It is basically a portable stabilized 12V → 5V power supply adapter that lets you power devices in a workshop or outdoors.

It can:

•  Connect to a car battery (alligator clips) or cigarette lighter socket
•  Provide stable 12V output
•  Provide 5V USB output (for phones or small devices)
•  Protect against:
  • Reverse polarity (wrong battery connection)
  • Over-current on USB output
  • Power instability during ECU/programming
    

    Why it is used

    In automotive programming (like BMW, Mercedes, VW ECU/IMMO work), voltage drop is dangerous. This adapter helps:

    • Prevent ECU corruption during flashing/programming
    • Keep stable voltage when working outside the car or in the workshop
    • Power ACDP tools or other diagnostic devices safely