Samsung 21700 40T – 30A 4000mah


Brand: Samsung

Out of stock

Email me when available

  ... people are viewing this right now

View Product Information

Samsung 21700 40T Battery

This is the best battery on the market for regulated devices pulling up to 25A (up to ~75W).

This battery provides incredible performance  for both regulated and mechanical devices, but truly shines when using a  regulated device, with incredible battery life.  


Please see Mooch’s review of the Samsung 21700 40T battery here.

“This cell outperforms every 18650 and 20700 in regulated devices at up to about 20A-25A (60W-75W). Only the Samsung 30T hits harder for 21700s …
At above 20A-25A (60W-75W)



Brand: Samsung

Model: 40T

Size:  21700

Nominal Capacity:  4000mAh

Discharge Current:  30A  Maximum Continuous

Style: Flat Top

Approximate Dimensions: 21.1mm x 70.4mm

Approximate Weight: 66.8g


Batteries are sold individually.

Weight 0.06 kg
SKU: 2116 Categories: ,

Customer Reviews

Based on 4 reviews
Delia H

Always trust to order from the Steamery! Fast, reliable, helpful. I have ordered various products from the Steamery and whether it's batteries, equipment or concentrates, they are always reliable and will order from them again.

Zac Gibson
Great battery for reg mods

Great battery life with these,best I’ve used

Heath Stephens
The new smurfs.

These batteries aren't the most amp powerful 30A... but what they lack there, they make up for in capacity..4000 maH these are perfect for 21700 orientated regulated mods... but where I think they shine is in a single coil squonk set up... where current isnt the biggest factor ...

If this is you and your set up... leave the 30Ts for the Cloud heads... and grab a few..

Battery goodness

I never thought I'd be reviewing a battery, but here I am. This is a good battery. You probably won't notice any difference between these and the Samsung 30Ts, but you will when compared to crappier brands (I'm looking at you iJoy).

Close My Cart
Close Wishlist
Close Recently Viewed
Compare Products (0 Products)
Compare Product
Compare Product
Compare Product
Compare Product