The Ultimate: 3.7 XL Vari-Flow Premium Kit | 4 Colors

starting at: $56.95

(5 customer reviews)


Get ready for the ultimate vape kit, featuring the 3.7 XL battery, which is the high capacity version of our best selling 3.7 volt vape pen battery, and the vari-flow ceramic cell cartridge.  The increased capacity means less frequent charging and the vari flow cart means you can dial in your hit.

The 510 thread is compatible with almost every oil cartridge while the 3.7 voltage works well with original style cartridges or ceramic cell and gives just the right temp for most oils.  This kit also comes with a car charger, USB charger and sunglass case. Available in Rugged Black, Steel, Rose Gold, or Rugged Wood Grain To mix colors on 2 or 5 packs put in note section on checkout.

Vape Kit Features:

  • 3.7 XL Battery Volt, perfect for a wide range of oil cartridges
  • Vari-Flow Ceramic 510 Cartridge with adjustable air flow valve
  • O2VAPE Sunglass kit case
  • Car USB adapter and USB Charger both included
  • Huge 650 Mah capacity for extended usage
  • Lifetime Warranty

Vari-Flow Cartridge Features:

  • 510 Thread
  • Available with locking cap or non-locking cap (Locking cap is a child proof, single fill and cannot be opened)
  • .5ml capacity
  • Ceramic cell heating element
  • Air flow control valve
  • Best for Medium to thick thicker oil
  • For Aromatherapy purposes only

Additional information


Steel, Rugged Black, Rose Gold, Wood Grain, Rugged White

Button or Buttonless

Button Activated, Buttonless (Autodraw)

Tip Style

Chrome, Rose Gold, Wood Grain

Number Of Vape Pens

1 Vape Kit, 2 Vape Kits, 5 Vape Kits

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5 reviews for The Ultimate: 3.7 XL Vari-Flow Premium Kit | 4 Colors

  1. Noah A. (verified owner)

    Excellent pen. Long battery life. Sleek and comfortable in hand. Perfect 6 second auto pull. This pen can hold up against the top contenders on the market for half the price. Wish I had known about it before I bought my old pen.

    • O2VAPE

      Thank you Noah! Enjoy…

  2. Nook (verified owner)

    Great battery life. Nice little case, pretty stealth. Looks kinda like a glasses case. Included cart hits silky smooth with a good strong draw. Impressed with my first purchase. Will have to scope out the rest of the lineup.

    • Dana E. Shoched

      Thanks Nook! Enjoy!

  3. Michelle (verified owner)

    Loving this Buttonless Vape,
    Ordered 2/16 with free standard shipping, had a tracking number the same day. Received order on 2/21(a holiday) via FedEx.

    I contacted customer support through email with a question about my order, and received a quick, helpful response! I had intended to order 2 accessories(one for each of the kits I bought) but had only ordered 1. The customer support rep sent me a second accessory, even though the mistake was totally my fault.

    The Device is top notch. I charged it fully before first use and have not had to charge it again yet, and I use it a couple times daily. It doesn’t burn my cartridge, or make it leak, and the flavor is great even from an almost empty cartridge.

    Thank you for a great product, and a great ordering experience. 10/10 would order again!

    • Dana E. Shoched

      Thank you so much Michelle! Welcome to the family!

  4. Guy in Iowa (verified owner)

    My new O2Vape has exceeded my expectations. As a 35+ year connoisseur, I have tried countless devices/accessories of all types. O2Vape is a high quality battery in every way; appearance, battery life, function, heat level, etc…
    I have several 510 batteries and this one is far superior to anything that I now have or have used in the past. If you’re unsure about making the purchase, go ahead and try O2Vape – I’m certain you’ll be as happy as I am with the purchase.

    • Dana E. Shoched

      Thank you so much and welcome to the family!!!

  5. Mark

    Feels classy in hand and on the lips

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