Test/Review of Efan IMR18650 2000mAh (Red)

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HKJ
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Test/Review of Efan IMR18650 2000mAh (Red)
Efan IMR18650 2000mAh (Red)

DSC_6567

Official specifications:
  • Spec: Lithium 18650-2000mAh 3.7V
  • Material: IMR
  • Capacity: 2000mAh
  • Nominal voltage: 3.7V
  • Lowest permitted discharge voltage: 2.5 V
  • Cycle life: 500 cycles
  • Max charging rate: 4.5 Amps
  • Max continuous discharge: 8C
  • Do not short circuit - High current will be discharged
  • Diameter: 18.2 +/- 0.5mm
  • Height: 66.34 +/- 0.5mm
  • Weight(g): 98g/pair
  • Operation Temperature Range: Charge(0~45°C ) Discharge(-10~60°C )

Efan%20IMR18650%202000mAh%20(Red)-info

A high current 18650 battery.

DSC_6565 DSC_6566

DSC_6568 DSC_6569

DSC_6570
DSC_6571

Efan%20IMR18650%202000mAh%20(Red)-Capacity

The two cells matches fairly good and has nearly constant capacity up to 7A, both 10A and 15A looks like heavy overload.

Efan%20IMR18650%202000mAh%20(Red)-CapacityTimeHours

Efan%20IMR18650%202000mAh%20(Red)-CapacityTime

Efan%20IMR18650%202000mAh%20(Red)-Energy

Efan%20IMR18650%202000mAh%20(Red)-PowerLoadTime

Efan%20IMR18650%202000mAh%20(Red)-TripCurrent

Efan%20IMR18650%202000mAh%20(Red)-Charge



Conclusion

The cells has accetable performance at lower currents, but its high current ability is not that impressive.



Notes and links

The batteries was supplied by Efan 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
Compare to 18650 and other batteries

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

Shadowww
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dat protection test graph.

Ledsmoke
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TY for the review. 

~ Ledsmoke ~

Dutch humor:

[quote=djozz]

 I do not think that the BLF-community ben

HKJ
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Shadowww wrote:
dat protection test graph.

Sorry about that, I forgot to strip the last data point.

 

It is fixed now

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

ImA4Wheelr
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Thank you for the review HKJ.  Your cell reviews are such a great resource for our hobby.

lagman
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I’m surprised at your calculated internal resistance. 0.26 ohms is way too much for a cell capable of discharging at 10A.

My English isn’t perfect but I’m trying to improve it. If you see something that doesn’t sound right or is just plain wrong, please feel free to point it out! Smile

HKJ
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lagman wrote:
I'm surprised at your calculated internal resistance. 0.26 ohms is way too much for a cell capable of discharging at 10A.

That is also a bit misleading, I do my calculation at the maximum current in the "protection" chart and because the voltage drops significantly at that current, I get a fairly high value.

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