S.T. Dupont Defi Lighters: Refilling, Maintenance, and Performance Tips

S.T. Dupont Defi Lighters: Refilling, Maintenance, and Performance Tips

Congratulations on your purchase of an S.T. Dupont Defi Extreme or Defi XXtreme lighter! Engineered for performance in extreme conditions, these lighters are the perfect companions for outdoor adventures, whether you’re scaling mountains or braving winter weather. To help you maintain your lighter and maximize its performance, we’ve put together this guide covering refills, flame adjustments, and troubleshooting.

1. Which Gas Refill Is Required?

To ensure peak performance, it’s crucial to use the correct gas refill for your specific model:

  • Defi Extreme (Single Flame): This model requires the Black S.T. Dupont Butane Refill. This premium butane provides clean, efficient combustion for reliable use in various conditions.

  • Defi XXtreme (Double Flame): This model uses the Red S.T. Dupont Butane/Propane Mix Refill, specially formulated to burn at higher altitudes and in colder temperatures. The propane mix ensures consistent ignition and a steady flame even in extreme weather.

S.T. Dupont Defi Extreme & XXtreme lighters with proper butane refills.

Using the correct refill for your model is essential to maintain optimal functionality and longevity.

2. How to Refill the Gas

Refilling Instructions for Both Models:

  1. Hold the lighter upside down to prevent air from entering the gas chamber during the refill process.

  2. Firmly press the nozzle of the appropriate gas canister (Black for Defi Extreme or Red for Defi XXtreme) into the refill valve. Hold for 3-5 seconds.

  3. Allow the lighter to rest for a minute before testing the flame.

S.T. Dupont Defi XXtreme lighter being filled with red butane/propane mix can.

3. How to Adjust the Flame Height

Both the Defi Extreme and Defi XXtreme lighters allow you to adjust the flame height to suit your needs:

  1. Locate the flame adjustment screw at the bottom of the lighter.

  2. Use a flathead screwdriver to turn the screw:

    • Turn clockwise to lower the flame.

    • Turn counterclockwise to raise the flame.

  3. Test the flame after each adjustment to ensure it’s set to your preference.

Flame adjustment valve on S.T. Dupont Defi lighter.

Pro Tip: For high-altitude or cold-weather use, a slightly higher flame may improve ignition performance.

4. Troubleshooting Common Issues

Issue: The lighter isn’t igniting.

  • Verify that the correct gas has been used (Black for Defi Extreme, Red for Defi XXtreme).

  • Check the gas level and refill if necessary.

  • Ensure the ignition mechanism is clean and free of debris.

  • Use a can of compressed air to clean your lint trap and flame ignitor frequently.

Issue: The flame is weak or inconsistent.

  • Confirm the gas refill is correct and the lighter is full.

  • Use a can of compressed air to clean your lint trap and flame ignitor frequently.

Issue: The lighter struggles in cold or high-altitude conditions.

  • For Defi XXtreme, ensure you’re using the Red butane/propane mix, as it’s designed for these conditions.

  • Warm the lighter slightly by holding it in your hand if the temperature is extremely low.

Issue: Gas is leaking during refilling.

  • Make sure the refill canister is properly aligned with the valve. Hold both the lighter and canister steady during the refill process.

  • If the issue persists, your lighter may need to be sent in for service.

Built for Adventure, Ready for Anything

Your S.T. Dupont Defi Extreme and Defi XXtreme lighters are engineered to perform in the toughest conditions. With proper care, the right refills, and a little maintenance, they’ll serve you reliably whether you’re lighting a cigar on a snowy mountain or during a breezy coastal evening.


Keep your lighter in peak condition with the correct S.T. Dupont gas refills and accessories. Visit our store to find everything you need to keep your lighter ready for any adventure.

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