Test / Review: Efest 18650 2250mAh (Black)

Efest 18650 2250mAh (Black)
Button top



Official specifications:

  • Efest IMR 18650
  • Brand: Efest Model: CGR-N
  • High Drain battery
  • Capacity:2250mah Material: Li-Mn
  • Positive Pole: Button top
  • Size:18.41(W)*66.88(L)mm




This is the button top version, this means that a button has been added to the top of the cell, making it slightly longer.

























Flat top



Official specifications:

  • Efest IMR 18650
  • Brand: Efest Mode
  • High Drain battery
  • Capacity:2250mah Material: Li-Mn
  • Positive Pole: Flat top
  • Size:18,23(W)*65,12(L)mm




The flat top version of the battery matches the 18x65 mm specification.

























Conclusion

Efest does not specify the actual cell used, but the capacity specifications and discharger curves matches the a Panasonic cell, making this a very good battery.



Notes and links

How is the test done and how to read the charts
How is a protected LiIon battery constructed
More about button top and flat top batteries

Thanks for the review!! :)

Yes, Efest is really coming. Thanks for the review. :)

They got a huge selection of batteries:

Thanks for the review :slight_smile:

*drool*

You got two of each to test? I just saw the Efest IMR in your comparator but the article isnt up yet. I guess thats the next?

Btw, your pictures are a little large here. Could you post them with size set to 100%? That way they will adapt to screen size.

Checked EFest on AliBaba site and linked to EFest home site. Great battery line-up just wish they’d eliminate all the duplicate listings. BTW I saw some “AW” branded cells listed, which surprised me.

According to AW they are fake.

Exactly.

I have not decided what is next yet, I have a couple of finished tests, both Efest and other.

I do not write a special review for BLF, but simply copies the html I uses on my website. I.e. I cannot do special adjustments.

Thanks very much! Frontpage’d and Sticky’d.