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 (120)

per page
Page of 12
Eleaf iStick 40W TC Battery
I have had many Eleaf iStick 20W and 30W TC Batteries over the years, They worked great. The 40W is a step above both and works excellently.
The Eleaf iStick 40W TC Battery gets the job done with without overkill.
It works well with the older Nautilus tanks, which I love.
Vapeshops' prices and excellent customer service is par none!
Guest | 11/22/2020 4:55 AM
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Excellent Value
Lasts all day long; even with heavy vaping.
I use the 40w iStick with a GeniTank because I prefer a slender mouthpiece rather than a fat one.
Great price.  Vapeshop sells this 40w battery for less than the 20w iStick offered by major competitors.
David D | 11/12/2020 8:20 AM
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Love these!
Only been vaping for 4+ yrs and started out with pens,etc. Ended up using a lot of the Eleaf products and once I ordered & used these I was very pleased. The 40Watt is just right for me.
Mary K | 11/11/2020 10:21 AM
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Eleaf iStick TC 40 Battery Still one of the best on the market
My favorite battery hands down. Small, powerful, quick to charge, last all day long, easy to use. The Vape Shop, WOV is simply the finest place to order from, prompt service, and reply, fast shipping, and the nicest people to deal with anywhere. I'm in my late 60's, the service I get from The Vape Shop, WOV, reminds me of the service we would get from the neighborhood MoM and PoP brick and mortar stores back in the day, it's still alive and well right here.
Larry L | 10/19/2020 3:39 PM
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Great Battery
My previous batter was an Istick 20w and this one is a big improvement. I like how the ohms are more accurate for my coils. And the increased battery life. Also great price and as always fast shipping.
Guest | 9/23/2020 12:02 PM
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iStick TC40w
Definitely a nice little battery. I have tried other but had conductive issues that caused the tank to build up a capacitive resistance which means every few minutes I would have to wipe the base of the tank on some cloth to discharge the capacitance. I have not had this problem with the iStick40w. I use a low wattage tank/wick so not having to clean the tank base is nice.
Guest | 6/13/2020 10:12 PM
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I'm very satisfied with my E-leaf battery, this is the third or fourth battery that I purchased from World of vape, and I doubt it will be my last.  The price is good, and the service is great.  Sure beats the prices of the local vape shop's.
Guest | 9/9/2020 2:25 PM
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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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iStick Battery
Works good. So many batteries will not work with the Aspire Nautilus tank but these do.
R Carl R | 8/9/2020 10:42 AM
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