Test/review of Efest IMR18650 2600mAh (Purple) 2017

HKJ

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[size=+3]Efest IMR18650 2600mAh (Purple) 2017[/size]

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Official specifications:
  • Rated capacity: 2600mAh
  • Nominal voltage: 3.7V
  • Voltage at end of discharging: 2.5V
  • Max. charging current: 4A
  • Standard charge: 2A
  • Discharging current 25A
  • Pulse discharging current: 40A
  • Charging temperature range: 0°C ~ 45°C
  • Discharging temperature range: -20°C ~ 75°C
  • Inner resistance: 20mOhm
  • Cell size: 18.50 (±0.20)mm x 65.20 (±0.2)mm

Efest%20IMR18650%202600mAh%20(Purple)%202017-info.png


A 2600mAh high current 18650 cell.

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Efest%20IMR18650%202600mAh%20(Purple)%202017-Capacity.png


Nice tracking discharge curves with nearly constant capacity.

Efest%20IMR18650%202600mAh%20(Purple)%202017-Temp-15.0.png


Efest%20IMR18650%202600mAh%20(Purple)%202017-Temp-20.0.png


Efest%20IMR18650%202600mAh%20(Purple)%202017-Temp-30.0.png


At 30A continuous discharge current the cell gets too hot.

Efest%20IMR18650%202600mAh%20(Purple)%202017-CapacityTimeHours.png


Efest%20IMR18650%202600mAh%20(Purple)%202017-CapacityTime.png


Efest%20IMR18650%202600mAh%20(Purple)%202017-Energy.png


Efest%20IMR18650%202600mAh%20(Purple)%202017-PowerLoadTime.png


Efest%20IMR18650%202600mAh%20(Purple)%202017-TripCurrent.png


Efest%20IMR18650%202600mAh%20(Purple)%202017-Charge.png




[size=+3]Conclusion[/size]

This looks like a very good high current cell and it can easily deliver the rated 25A current.



[size=+3]Notes and links[/size]

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
Compare to 18650 and other batteries
 
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