21700 Vape Mods UK | Single & Dual 21700 Mods

21700 Vape Mods

21700 vape mods take a single 21700 cell in place of the smaller 18650, which holds more charge and keeps you vaping for longer between top-ups. That extra capacity has made the 21700 the size of choice for sub-ohm vape mods, from compact single-battery devices to high-output dual builds.

Every 21700 mod here is in stock and ready to post. Compare the styles below, or jump straight to single battery mods or dual battery mods.

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Help & Guides

21700 Vape Mods at Ecigone

A 21700 vape mod runs on a single large 21700 cell, so it holds more charge than an 18650 and suits higher-wattage vaping. When choosing one, decide between a single mod for everyday portability or a dual mod for more power and longer sessions, then match the style to how you vape, whether that is a regulated box mod, a squonk, a mech or a boro build. Most are sold without a battery, so allow for a 21700 cell and a charger, and look for a screen and safety features on regulated models.

Why Vape with a 21700 Mod

A 21700 vape mod is powered by a single 21700 cell, a larger battery than the common 18650, so it carries more charge and lasts noticeably longer between top-ups. That headroom is why the 21700 has become the standard for sub-ohm box mods and higher-wattage builds. Stay on this page for every mod that takes a 21700, or browse the wider vape mods range.

Single vs Dual 21700 Mods

A single 21700 mod stays compact and pocket-friendly while still pushing plenty of wattage, which suits one-battery convenience. A dual 21700 mod doubles the capacity and the power ceiling, ready for longer sessions and lower-ohm coils. Choose single for portability, dual for stamina.

21700 Mod Types

The 21700 size covers every style of mod:

Box mods - regulated 21700 box mods with a screen, wattage control and built-in safety, the most popular pick.
Squonk mods - bottom-feed 21700 squonk mods made for RDA users.
Mech and tube mods - unregulated 21700 mech and tube mods for experienced builders.
Boro and AIO mods - 21700 boro and AIO builds that take a removable pod.

Choosing the Best 21700 Vape Mod

The best 21700 vape mod comes down to output, build quality and how often you vape. Well-regarded 21700 ranges include the Geekvape Aegis, Lost Vape Centaurus, Lost Vape Thelema, Asmodus and Dotmod, each with regulated single and dual options. For the top tier, see the high end vape mods.

21700 Batteries and Chargers

Most 21700 mods are sold without a cell, so you will need a 21700 battery and a charger to suit. Browse vape batteries and battery chargers to finish the setup. Many 21700 mods also accept an 18650 with the included adapter.

Frequently Asked Questions

A 21700 vape mod is a sub-ohm device powered by a single 21700 battery, which is larger than the common 18650. The bigger cell holds more charge, so a 21700 mod lasts longer between top-ups and can push higher wattage.

A single 21700 mod is smaller and easier to carry, while a dual 21700 mod doubles the capacity and power for longer sessions and lower-ohm coils. Choose single for portability and dual for stamina.

A 21700 is physically bigger than an 18650 at 21mm wide and 70mm tall, so it holds more capacity, typically 4000-5000mAh against roughly 2500-3500mAh. That means longer run time and often a higher continuous current.

Most modern sub-ohm box mods take a 21700, along with many squonk, mech and boro mods. Brands such as Geekvape, Lost Vape, Asmodus and Dotmod all make 21700 mods in single and dual battery versions.

Often yes. Many 21700 mods include an 18650 adapter sleeve, so you can run the smaller cell when needed. You lose some capacity, but it is useful if you only have 18650s to hand.