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

7 posts / 0 new
Last post
HKJ
HKJ's picture
Offline
Last seen: 2 weeks 12 hours ago
Joined: 05/24/2011 - 12:23
Posts: 7447
Location: Copenhagen, Denmark
Test/Review of Efest IMR18650 2000mAh (Red) 2014

Efest IMR18650 2000mAh (Red) 2014

V1 flat top

DSC_4773

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


Efest%20IMR18650%202000mAh%20V1%20(Red)%202014-info

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

DSC_4772

DSC_4774 DSC_4775

DSC_4776
DSC_4777

Efest%20IMR18650%202000mAh%20V1%20(Red)%202014-Capacity

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

Efest%20IMR18650%202000mAh%20V1%20(Red)%202014-CapacityTimeHours

Efest%20IMR18650%202000mAh%20V1%20(Red)%202014-CapacityTime

Efest%20IMR18650%202000mAh%20V1%20(Red)%202014-Energy

Efest%20IMR18650%202000mAh%20V1%20(Red)%202014-PowerLoadTime

Efest%20IMR18650%202000mAh%20V1%20(Red)%202014-TripCurrent

Efest%20IMR18650%202000mAh%20V1%20(Red)%202014-Charge




V2 button top

DSC_4778

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



Efest%20IMR18650%202000mAh%20V2%20(Red)%202014-info

The flat top batteries are basically the same.

DSC_4779

DSC_4780 DSC_4781

DSC_4783
DSC_4784

Efest%20IMR18650%202000mAh%20V2%20(Red)%202014-Capacity

Efest%20IMR18650%202000mAh%20V2%20(Red)%202014-CapacityTimeHours

Efest%20IMR18650%202000mAh%20V2%20(Red)%202014-CapacityTime

Efest%20IMR18650%202000mAh%20V2%20(Red)%202014-Energy

Efest%20IMR18650%202000mAh%20V2%20(Red)%202014-PowerLoadTime

Efest%20IMR18650%202000mAh%20V2%20(Red)%202014-TripCurrent

Efest%20IMR18650%202000mAh%20V2%20(Red)%202014-Charge



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

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Edited by: HKJ on 04/19/2014 - 07:51
musicmagic
Offline
Last seen: 6 years 9 months ago
Joined: 10/28/2013 - 09:53
Posts: 984
Location: CT

Are these efest cells, or just efest wrappers?

If you can’t blind them with your brilliance, baffle them with your bullcrap.

The real currency in the world is not money, it’s trust.

WarHawk-AVG
WarHawk-AVG's picture
Offline
Last seen: 1 year 6 months ago
Joined: 01/04/2014 - 06:47
Posts: 5071
Location: H-Town

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

RaceR86
RaceR86's picture
Offline
Last seen: 5 years 9 months ago
Joined: 02/22/2012 - 08:32
Posts: 3777
Location: Norway

WarHawk-AVG wrote:
..... , 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.

BLF LED database – collaboration spreadsheet and latest news about where to buy LEDs
http://budgetlightforum.com/node/19342

HKJ
HKJ's picture
Offline
Last seen: 2 weeks 12 hours ago
Joined: 05/24/2011 - 12:23
Posts: 7447
Location: Copenhagen, Denmark

musicmagic wrote:
Are these efest cells, or just efest wrappers?

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.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

WarHawk-AVG
WarHawk-AVG's picture
Offline
Last seen: 1 year 6 months ago
Joined: 01/04/2014 - 06:47
Posts: 5071
Location: H-Town

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

HKJ
HKJ's picture
Offline
Last seen: 2 weeks 12 hours ago
Joined: 05/24/2011 - 12:23
Posts: 7447
Location: Copenhagen, Denmark

WarHawk-AVG wrote:
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.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/