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Back To Basics V4 21700 / 20700 Mech MOD by Purge Mods

 star rating 5 Write a Review
$169.99 (You save $30.99)
SKU: 500300
Ships within 24 to 48 hours (see our shipping policy for details).

    For all other Back To Basic V4 Mech MOD & Kit options, click appropriate image below:

    B2B V4 Mech MOD Kit B2B V4 Mech MOD & Skull Cap Bundle B2B V4 Stack Mech MOD Kit 

    Back 2 Basics V4 21700 / 20700 / 18650 Mech MOD by Purge Mods

    The Back 2 Basics v4 Mech MOD is the reiteration of Purge Mods' acclaimed and beloved B2B V3, the affordable all-purpose mechanical vaping platform designed to push your cloudage, not your wallet. Borrowing many facets from the previous version, the B2B V4 has a solid naval brass chassis broken only by the 510 threading, firing switch, and an impressively etched signature Purge skull logo. The proprietary magnetic Purge firing switch is the same high performance enabler that comes in every Purge mech mod, endowing this mech the incredible performance Purge Mods is known for. The Back 2 Basics v4 can accept 20700 and 21700 battery cells as well as 18650s by using the included delrin battery adapter.


    *This product does not qualify for free shipping and it has a fixed insured shipping cost of $6.99 for U.S. addresses ONLY.

    Find Your Spares and Upgrades Here:

    Purge Mods Replacement Magnets Purge Mods Solid Silver Spring Purge Mods 18650 Battery Adapter


    • 464 Naval Brass Construction or C145 Tellurium Copper Chassis
      • Single Set of Body Threads
      • CNC Engraving
      • Locally Made in Orlando
    • Accepts Single 18650 | 20700 | 21700 Battery
      • Copper Battery Contact
      • 18650 Battery Sleeve Included
        • Copper Engraved Contact
        • Contacts Positive Pole**
    • Hybrid 510 Connection
    • Signature Beefy Purge Firing Switch
      • "Purge" Logo Switch Engraving
    • Diameter: 28.5mm

    Box Contents

    • 1x Back To Basics V4 21700 / 20700 Mech MOD by Purge Mods
    • 1x 18650 Battery Sleeve
    • 1x Purge Mods Hard Carrying Case
    • 1x Purge Mods Authenticity Card

    **The Back to Basics v4's 18650 adapter sleeve MUST be placed over the positive side of your battery. The copper contact on the sleeve must between the battery positive and the atomizer's positive pin. Do NOT place the sleeve on the negative side of your battery or you run the risk of the mod auto-firing.

    PLEASE NOTE: This is 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.

    Write your own product review

    1. perfection as expected  star rating

      Posted by Tony on 11th Nov 2019

      Extremely happy with my purchase. Mod hits like a truck and has a good weight to it. I can’t enough about how happy I am with the customer service. Fast shipping, reliable source, great customer service, you can’t beat it!

    2. Beautiful  star rating

      Posted by Daniel Cantrell on 27th May 2019

      Well made beautiful smooth threads just a great addition to any collection

    3. Solid Mech  star rating

      Posted by Gus on 24th Apr 2019

      Recently started getting into mech mods...and this purchase was probably the best money I've spent thus far on any vape gear. I even purchased the extension tube so I can stack these bad boys.

    4. Best B2B from the B2B series!!  star rating

      Posted by Demonz210TX on 18th Oct 2018

      Now that V4 B2B accepts 21700 it's the best B2B version imo. This is a very sleek and clean looking 21700 straight tube mod. 28.5mm on the top. So if have 28.5mm attys they will sit flush on the B2B V4. Has a very nice weight to it and the threads are super clean. The new logo adds a very nice touch to it. I really love this new V4. Cant wait to see what other colors Purge will add to the V4!! The price point is very good for this very good quality mech. It's a must have to add your Purge collection. If it's your first Purge mod then you won't regret it. Very nice hard hitting mech!!

    5. B2B V4  star rating

      Posted by Alan Bodiford on 18th Oct 2018

      It's the best B2B mod released yet. holds a 28.5 mm RDA 21700 battery for maximum Firepower, stackable with the 2700 assassin's what's not to like. it hits as hard as a slam and cost a fraction of the price. It has a great feel it's a nice heavy solid Purge mod.

    6. great mod  star rating

      Posted by jym on 15th Oct 2018

      hits hard has a nice heft to it same purge quality as any other of their mods . the 28mm diameter fits perfect in the hand

    This product does not carry any warranty and we only guarantee that you will not receive it DOA (Dead on Arrival).

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