DDiesel 21700 Top Cap by Comp Lyfe

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SKU:300532 ,Availability: ,Width: ,Height: ,Depth:


Ships within 24 to 48 hours (see our shipping policy for details).


EVCIGARETTES.COM This product does not carry any warranty and we only guarantee…


EVCIGARETTES.COM This product does not carry any warranty and we only guarantee that you will not receive it DOA (Dead on Arrival). COMP LYFE Comp Lyfe provides a Limited Lifetime Warranty that applies to manufacturers defects only. This does not include normal wear and tear, cross-threading, broken magnets, abuse, loss or theft. Please email info@complyfe.com for further information and assistance.


DDiesel 21700 Top Cap || Comp Lyfe

The DDiesel 21700 Top Cap allows you to convert your Double Double (DD) Stackable Extension into a single mech tube whenever you're not in the mood for a stacked setup!  


  • 1) Tighten Battle Deck onto DDiesel 21700 Top Cap.  Set aside.
  • 2) Thread button housing onto DoubleDouble (DD) Stackable Extension, then insert Battery positive side up.
  • 3) Place Donut Contact on top of Battery.
  • 4) Thread DDiesel 21700 Top Cap onto DoubleDouble (DD) Stackable Extension and adjust housing for battery rattle.

NOTE: Color pattern may vary with Anodized Titanium finishes.


  • Brass, Raw Titanium or Anodized Titanium Material
  • Compatible with DoubleDouble (DD) Stackable Extension by Comp Lyfe ONLY
    • Adds Top Cap to DoubleDouble for Use as a Single Tube Mech
      • DoubleDouble, Button Housing and Donut Contact Required (SOLD SEPARATELY)
  • Dimensions: 18mm (H) x 29mm (D)
    • 32mm at Widest Point

Box Contents

  • 1x DDiesel 21700 Top Cap

PLEASE NOTE: This product is designed for use as a direct battery contact mechanical device and it is strictly for ADVANCED USERS ONLY! Be sure to check your atomizer's 510 connection when using it with this device. If your atomizer's positive pin in the center of the 510 connection does not protrude >1mm from the threads of the connection, your device WILL fail catastrophically. Use at your own risk! This mod does not have a locking mechanism, so keep it away from children! Mechanical mods are an advanced user product and should not be used by anyone without the proper knowledge on your battery's amp limit and how to test your atomizer's resistance. This mechanical mod uses very strong magnets in the switch—please be careful when disassembling your mod. Avoid using your device to the point where the batteries are completely discharged. Always double-check the resistance of your atomizer on an external ohmmeter, and ensure that your batteries are inserted with the positive pole facing the atomizer in order to prevent battery failure.

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