Shop for the latest & greatest Efest Products from Legion Of Vapers.
Shop for the latest Efest batteries, chargers and accessories at Legion of Vapers, sourced through authorised UK distributors only.
Efest is one of the most recognised names in vape battery manufacturing, built on a reputation for consistent cell performance and reliable charging hardware. The brand produces a focused range: high-drain lithium-ion batteries in 18650, 20700 and 21700 formats, alongside a line of intelligent chargers designed to handle those cells safely and efficiently. Vapers running external battery mods choose Efest because the cells deliver stable power output across a wide wattage range, and the charger range keeps things simple without cutting corners on safety features like overcharge protection and automatic cell detection. Counterfeit batteries remain a genuine concern in the UK market, which is why every Efest product we sell comes through authorised UK distributors only. What you buy here is the real thing, with no grey-market risk.
Efest built its name by focusing on what matters most for high-drain applications: consistent CDR (continuous discharge rating), stable voltage curves and tight manufacturing tolerances. That combination keeps cells performing predictably over hundreds of charge cycles, which is why experienced vapers who run external battery mods tend to stick with the brand once they’ve tried it.
That focus on cell consistency is what keeps vapers coming back. Efest’s charger lineup rounds things out, giving you a complete system rather than a battery you need to pair with something from a separate brand.
Efest Batteries
Efest produces lithium-ion cells in 18650, 20700 and 21700 formats, covering the most common battery sizes used in vape mods. Capacity options typically range from around 2500mAh up to 3000mAh-plus in the larger 21700 cells, with CDR ratings suited to regulated box mods running at 60-200W.
If you’re running a high-powered dual-battery mod, the 21700 cells give you more capacity and noticeably better runtime between charges compared to 18650s. We’ve run dual 21700 setups at 80W and the difference in session length versus 18650 is real and consistent.
Efest Chargers
The Efest charger range is built around simplicity and safety. Models include single-bay and multi-bay options, with automatic cell detection that adjusts the charge rate based on the cell inserted. Features like overcharge cutoff and reverse polarity protection are standard across the range.
If you’re running two batteries in a dual-battery mod, a two-bay charger lets you charge both cells together and keep them matched in cycle count. Keeping cells paired matters for long-term performance, even on regulated mods.
Efest Accessories
Efest also produces a small range of supporting accessories including battery cases and sleeves. A hard carry case is worth having if you transport spare cells. Loose batteries in a pocket or bag is a genuine safety risk, and battery cases are inexpensive enough that there’s no good reason to skip them.
With hundreds of verified reviews and a loyal UK customer base, Legion of Vapers is a vape shop people come back to.
Shop vape kits, pods, coils, tanks, mods, shortfills, nic salts and accessories, all in one place.
Order before 3:30pm Monday to Friday and we dispatch the same day. Most UK orders arrive in 1 to 2 working days.
Need help choosing a kit, matching coils, or picking the right liquid for your style? Message us. You’ll get proper advice from a UK-based team.
We stock Efest because the cells do what they say on the label. Through our own use with regulated box mods at mid-to-high wattage, the discharge performance has been consistent and the chargers reliable without being fussy to set up.
For vapers who run external battery mods, Efest keeps things straightforward without compromising on the specs that matter.
The right choice depends on what mod you’re running, how many batteries it takes and how much runtime you want between charges. Here’s a practical way to think through it.
Start with an 18650 in the capacity your mod requires and a single or dual-bay Efest charger with automatic detection. It’s the most common format and the easiest to find replacements for. Before you do anything else, read our vape battery safety guide – it covers safe charging and storage in plain English and takes about five minutes.
A dual 18650 or dual 21700 setup gives you more headroom at higher wattages. Pair with a two-bay charger and always charge both cells together so they stay matched in cycle count. Keeping them paired extends useful battery life, even on regulated mods where mismatched cells carry less risk than on a mech.
If you’re pushing 100W or more on a sub-ohm tank, a 21700 cell is worth considering for the improved capacity and slightly lower internal resistance at high drain. The runtime between charges is noticeably better than 18650 at sustained high wattage. Our guide to 18650 vs 21700 vs 20700 vape batteries covers the full comparison if you want the detail.
CDR matters more on a mech than on a regulated mod because there is no chip between the battery and the coil. Match your Efest cell’s CDR rating to the amp draw your build will pull, with a safety margin built in. If you’re not sure how to calculate that, our Ohm’s Law guide walks through the maths clearly.
Pick a dual-bay Efest charger with automatic detection and a matched pair of 18650s. Charge, vape, repeat. Auto-detection means you don’t need to manually set charge current – the charger reads the cell and sets it correctly, which removes one more thing to think about.
Fake cells often misrepresent capacity and CDR figures, which creates unpredictable performance and genuine safety concerns. Every Efest product we sell comes through authorised UK distributors only. You’re not buying a grey-market cell with re-wrapped specs. What the label says is what the cell delivers.
We keep Efest pricing competitive and run multi-buy options so you can pick up a matched pair of cells without paying over the odds. Batteries are a regular running cost, and you shouldn’t have to shop around to get a fair price on something you replace routinely.
Order before 3:30pm Monday to Friday and we dispatch the same day. Most UK orders arrive in one to two working days. If you’ve run your cells down and need replacements quickly, you won’t be waiting a week.
Our team uses external battery mods every day. We can tell you which Efest cell is the right fit for your specific mod, whether a single or dual-bay charger makes more sense for your setup, and how to get the most cycles out of your batteries. Message us and you’ll get a straight answer from someone who has actually used the kit – not a scripted reply. All support comes from our UK-based team with hands-on experience across every product line we stock.
Explore our answers to some frequently asked questions.
Efest produces cells in 18650, 20700 and 21700 formats. Most regulated box mods use one of these sizes. Check your mod’s battery compartment spec before ordering to confirm the correct format and whether you need one cell or two.
CDR stands for continuous discharge rating, measured in amps. It tells you the maximum current a cell can safely deliver on a sustained basis. Matching CDR to your mod’s draw is critical for mechanical mod users, and still good practice on regulated mods.
Replace a cell if it loses charge noticeably faster than it used to, or if it shows any physical damage – torn wrap, dents or swelling. A battery with a damaged wrap should be re-wrapped or retired immediately. Don’t use a damaged cell.
A two-bay Efest charger with automatic detection is the practical choice. It lets you charge both cells simultaneously, keeps them matched in cycle count, and sets the charge rate automatically. You don’t need to configure anything manually.
The 21700 offers more capacity and handles sustained high drain slightly better. If your mod supports 21700 and you regularly vape at 80W or more, the runtime improvement is noticeable. See our 18650 vs 21700 vs 20700 guide for a full breakdown.
Yes, provided you match the cell’s CDR to your build’s amp draw with a suitable safety margin. Use Ohm’s Law to calculate your draw before building. On a mech there is no chip protection, so never exceed the cell’s rated CDR.
Category
Flavours
Strength
Size
Flavours
Brand
Multibuy Offers
