Test/Review of Efest IMR18650 2000mAh (Red) 2014

Efest IMR18650 2000mAh (Red) 2014

V1 flat top



Official specifications:

  • Efest IMR 18650
  • Brand: Efest Model: 18650 V1
  • Capacity:2000mah Material: Li-Mn
  • Positive Pole: flat top
  • Sizes: 18.11(L)*65.02(W)mm




Thse batteries are fairly low capacity and not really high current.










The batteries do track and can deliver 7A, this is not very impressive for 18650 IMR cells today.
















V2 button top



Official specifications:

  • Nominal Voltage: 3.7v
  • Battery Model: 18650v Capacity: 2000mAh
  • Positive: Nipple Top (button top)
  • Cycle Life: 500 Cycles
  • Max Charging Rate: 4.5amps
  • Sizes: 18.10(L)*66.06(W)mm





The flat top batteries are basically the same.
























Conclusion

As IMR batteries they are not very impressive.
At 7A and below they do have an acceptable performance.



Notes and links

The batteries was supplied by Efest 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

Are these efest cells, or just efest wrappers?

Excellent as always HKJ! Thanks

These are Efest, standard GP 5A constant draw workhorses…there are MUCH better batteries but cost for what people use them for Efest are the best cost/use ratio out there (other than laptop pulls), but these do VERY well in vaping and in high power flashlights

No they don't, these batteries suck. Bad capacity and bad at high amps.

Thanks for another set of great reviews HKJ.

I do not really now, but I do not expect that Efest owns a LiIon battery factory, i.e. I expect that they are "just" Efest wrappers.

Recommendations? I happily vape at 6.5 watts and 8 watts with mine, never miss a beat, the 18500’s do seem to peter out way to fast for my liking

And for the price I can’t complain

8 watt is only between 2A and 3A, you can just about use any 18650 LiIon battery for that.