WARNING: This product contains nicotine. Nicotine is an addictive chemical.

Full Description

This is the Eleaf iStick 40W Battery, VS also offers the Eleaf iStick 40W TC kit. The Eleaf iStick 40W TC is the latest iStick from Eleaf - it is replacing the older iStick 30W. The Eleaf iStick 40W TC is not only an improvement over the iStick 30W both in terms of build quality and, of course, adding an extra 10W of power, but it also provides the ability to use Temperature Control coils as an option.

The Eleaf iStick 40W TC has two modes of operation:

  • Regular variable wattage mode to use with regular Kanthal coils (same as previous iStick but capable of delivering up to 40W)
  • Temperature Control mode to use with special Ni Temperature Control coils

The Eleaf iStick 40W TC is the first Temperature Control (Variable Temperature - VT) mod from Eleaf. The Eleaf iStick 40W TC is the latest iStick version from Eleaf - the latest version of the hugely popular iStick series. The Eleaf iStick 40W TC is both a VW (Variable Wattage) and a VT (Variable Temperature) device. The Eleaf iStick 40W TC - as its name implies - can power a coil up to 40W. In Temperature Control (TC) mode - the Eleaf iStick 40W TC is compatible with Nickel coil, and in Variable Wattage (VW) mode the Eleaf iStick 40W TC can use any standard Kanthal coil. The Eleaf iStick 40W TC also comes with a battery capacity of 2600mAh. The Eleaf iStick 40W TC design is similar to the previous iStick 30W version with some improvements like a better quality power button - a repositioned 510 connector to perfectly fit any 22mm tank, etc...

The Eleaf iStick 40W TC comes in 4 colors:

  • Black
  • Blue
  • Silver
  • Grey

Eleaf iStick 40W TC Battery Package Contents:

  • 1 x iStick 40W TC
  • 1 x User Manual

Temperature Control is the latest trend in the vaping community, it provides the ability to vape at different temperatures to achieve the best possible vape. Temperature Control devices are also very helpful to prevent coil burning which is important with cotton coils.

VS Comments:

At VS we select only the best devices in each category. Our temperature control devices must not only provide the ability to vape at different temperatures, but they must also be easy to use, the first generation of temp. control devices either did not work well and/or were difficult to use. We tested many of them, and had to reject them all, we hoped the technology would improve. We simply could not recommend to our members any of the first generation temp. control devices. Well... our patience paid off, the new Eleaf iStick 40W TC is easy to set up and enjoy. The Eleaf iStick 40W TC is for sure the most economical way to enter the temperature control world of vaping.

Eleaf iStick 40W TC Features:

  • Dimension: 36.2mm x 22.3mm x 77.3mm or 3-1/16"L x 1-3/8"W x 7/8"D
  • Passthrough: The battery can be recharged while vaping
  • Ultra Large Battery Capacity: 2600 mAh
  • Operating Wattage: From 1W to 40W
  • Output Voltage: 0.5V-8.0V
  • Connector Thread: 510 stainless steel thread and spring loaded connector for best connection
  • Output Mode: TC-Ni / VW Mode
  • Temperature Range: 100-315℃ / 200-600℉ (TC mode)
  • VT Resistance Range: 0.05-1ohm (TC mode)
  • VW Resistance Range: 0.15 - 3.5ohm (VW mode)


VapeShop only offers genuine products. Our members are increasingly reporting seeing clones in B&M stores and a few online sites. VapeShop strongly encourages manufacturers to use security authenticity code on all their products and we also encourage everyone to check it when available.

Video Reviews (1)

Eleaf iStick TC 40W temperature control Review On TVC
By The Vapor Chronicles
Duration: 00:25:49
Published on: 6/29/2015

Reviews (109)

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Great price, great product.....I will buy again and again!!!
Guest | 5/28/2020 5:20 AM
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Tried a bunch of these batteries,(atomizer- Batteries) This is by far the best one yet !!!
Guest | 5/23/2020 6:38 AM
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This is about my 7th or 8th 40W istick battery and is definitely the one I like best, after trying numerous others.

Vapeshop has great prices and they ship quickly.  I will always try here first.
Guest | 5/17/2020 10:28 AM
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This my first time ordering from Vapeshop and it won't be my last. So easy to order, merchandise received in a timely matter and the battery is a great price and stays charged for a couple of days. I quit smoking 9 years ago by vaping and I would recommend vaping to anyone who wants to quit for good. The technology has improved tremendously over the years and your company has been in the fore front. Thanks again.
Guest | 3/29/2020 11:23 AM
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My 3rd one
The first one lasted a long time then died.  My 2nd one lasted a long time too and was perfectly fine until it was stolen from my house.  I am replacing that one and wanted one just like it.  Love this battery!  Fits perfectly in my hand and isn't heavy like the others I've tried.  Hope it gets here quickly!!
Guest | 2/14/2020 3:03 PM
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Eleaf 40W is just right
I have about 4-5 of these in my stash. They are just the right size to stick in your pocket and they last all day. What more could you ask for.
Guest | 1/27/2020 6:55 AM
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Exactly what I need
This battery is actually the 2nd time I've purchased. It is small, compact, and works with every cartridge. I usually use it at under 10W settings so the battery life last forever, I'm talking about 2 weeks+ of use before having to recharge.

If I lose this, I am definitely purchasing another one.
Guest | 1/10/2020 7:51 AM
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Love mine
Love this battery.  
Guest | 12/26/2019 7:16 AM
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The previous I-stick models allowed you to lock the voltage (or wattage) setting so that it wouldn't get changed while in your pocket. This new one says you can lock it in Temp mode by holding the up & fire buttons.. and you can, until you take a hit and then it returns to variable wattage mode and the lock is off. maybe because I don't have nickel coils??

Can anyone tell me how to lock the voltage setting so I don't burn up coils when it gets bumped to full power in my pocket???
Guest | 11/24/2019 4:12 PM
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Eleaf 40W TC Battery
This is my second iStick battery.  The first one I had lasted 5+ years, so I knew it was a good one.  This new one is upgraded from my first one, and the only (minor) problem I'm concerned with is the W and V setting for my 1.6 ohm atomizer.  It is not compatible with the TC feature, so I set it on 5.0W. The ohm says 1.71. I can't find the right setting for the 1.6 ohm. I don't want to damage the unit or take a risk of it overheating.  I love it otherwise!
Guest | 11/20/2019 8:34 AM
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