Test/Review of Efest IMR18650 2500mAh (Purple) 2014

Efest IMR18650 2500mAh (Purple) 2014



Official specifications:

  • Capacity: 2500mAh
  • Min. Capacity: 2400mAh
  • Nominal voltage: 3,6 - 3,7V
  • Charge voltage: 4,20V ±0,05
  • Discharge voltage: 2,75V
  • Max discharge current: 35A (14C)
  • Positive pole: Flat Top
  • Protection circuit (BMS): no (unprotected)
  • Diameter: 18,40mm ± 0,1
  • Height: 65,25mm ± 0,2
  • Weight:48g ± 1
  • Charging methode: CC-CV




This is a very high current battery, but the 35A rating might be a bit optimistic.












These curves shows a very good battery, there is a good tracking between the batteries and not much capacity drop from 0.2A to 20A.















Conclusion

Usual a battery with unspecified cell will not get better rating than acceptable, but there is no doubt this is a very good cell that is used here.



Notes and links

The batteries was supplied by Akkuteile.de for review.


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. Been looking forward to comparing this cell with the others. Great performance!

Quite similar performance to KP latest 2500 mAh IMR aka LG ICR18650HE2.

I would take the KP/LG over this though. And the better 26650s over those..

Awesome review…definitely posting this on some vaping forums!

Thanks again HKJ!

These look like great cells for high drain applications, i hope the smaller versions of this model perform similarly, do you have them on the agenda for testing?

Yes, I have already tested them (18500, 18350), I just need to do make the review.

Thanks for the review! :slight_smile:

Thanks, very nice battery, it will be my next purchase :-)

FYI in this video a guy shows this kind of battery venting at 14A in an e-zig.