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8.3 Final Score
Sigelei GW 257W Review Bottom Line

The Sigelei GW 257W mod utilizes dual 21700 batteries to produce an awesome battery life. It also has the ability to use traditional 18650 batteries so not all is lost for those traditional vapers. With all the features you could wish for and manufactured by a reliable name Sigelei, this mod is one of the best you can get.

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The Sigelei GW 257W Mod Kit

In-depth Sigelei Great Wall (GW) 257 Kit Review

Sigelei have had a great year for releasing box mods and they have ended the year with another great release, the Great Wall (GW) is their attempt to create a mod with the longest battery life and all the functionality every type of vaper need. In this Sigelei GW 257W review we’ll take a look at the kit and see if it competes with the best vape mods and see if it lives up to its reputation.



This mod is ultimately designed to use the traditional 18650 battery along with the 20700 and the 21700. This means it comes with collars to add to the smaller batteries to ensure a snug fit. The designers, therefore, had quite a task producing a mod that can fit these larger batteries in, yet still achieving a small looking design.

Different Designs of the Sigelei GW 257W Mod KitWe think they achieved their goals, not only does the design work really well with all the batteries, but it also looks real full-color   Yes, it’s a little bigger than the traditional, 2 x battery mod, but not enough to really notice.

Made from Zinc alloy with some cool Chinese letters down the side along with a full-color TFT screen this mod screams class! For the money, you do get a lot of stuff and a great mod, but make sure you check out our vape deals page where this and mods like it often pop up at even better prices.



So how does this mod perform? We tried it with the 21700 batteries and can say that the battery life is awesome. Vaping all day, pretty much all the time this mod lasts! Granted it probably wouldn’t if you were firing it at full capacity of 257 Watts!

The responsiveness of the firing is also really good, making it a pleasure to be used and vape with.  With the 18650 batteries, the device works just as well, but the only drawback is the awkwardness of having to fit the tubes on the smaller batteries. I’m sure you would get use to this though!

Is this mod for someone looking to quit smoking with vaping, probably not as it has too many features and the F Tank is really designed for those direct lung inhales.  Also as it’s a little larger than the traditional dual battery mod, it’s probably not going to suit the person carrying it in your pocket all day. That said if you’ve used a vape mod before, you’ll have no problem using this mod and probably fall in love with it.



  • Dimensions of the mod:  93 x 57 x 36mm
  • Sigelei GW 257W Mod Kit View

  • 1.0-inch TFT Full color screen
  • 10 – 257 Watts Power Range
  • Resistance range: 0.05 Ohm – 3.00 Ohm
  • Temperature  100℃-300℃ / 200℉ – 570℉ range
  • Coils  NiCr / SS (316 / 317 / 304) / Ti / Ni200 / TCR
  • Support either 2x 21700, 2 x 20700 or 2 x 18650 (not included in the kit)
  • 35 Amp maximum current


F Tank Specs:

  • Dimensions of tank: 28mm x 53 mm
  • 4.5 mL e-liquid capacity
  • Bottom airflow adjustment
  • Single coil of 0.2 Ohm


To Conclude

Overall, we were really impressed and pleased with the performance of the Sigelei 257 W Kit and in it’s particular class it is one of the best e-cigarette devices available. The design is well thought out and the features are really easy to use. If you like the idea of a mod with huge battery life, then this is the one for you!


Nicholas King
Nicholas King
Nicholas King is the sole owner and editor of SmokeTastic. Nicholas, use to smoke 30 a day back in 2011 before converting to vaping. With a depth of knowledge in the vaping industry and the research he conducts, makes him one of the most recognized and experienced vapers in the industry.