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

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

Efest IMR18650 2600mAh (Purple) 2017
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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
A 2600mAh high current 18650 cell.
DSC_0274 DSC_0275
DSC_0277 DSC_0278
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Efest%20IMR18650%202600mAh%20(Purple)%202017-Capacity
Nice tracking discharge curves with nearly constant capacity.
Efest%20IMR18650%202600mAh%20(Purple)%202017-Temp-15.0
Efest%20IMR18650%202600mAh%20(Purple)%202017-Temp-20.0
Efest%20IMR18650%202600mAh%20(Purple)%202017-Temp-30.0
At 30A continuous discharge current the cell gets too hot.
Efest%20IMR18650%202600mAh%20(Purple)%202017-CapacityTimeHours
Efest%20IMR18650%202600mAh%20(Purple)%202017-CapacityTime
Efest%20IMR18650%202600mAh%20(Purple)%202017-Energy
Efest%20IMR18650%202600mAh%20(Purple)%202017-PowerLoadTime
Efest%20IMR18650%202600mAh%20(Purple)%202017-TripCurrent
Efest%20IMR18650%202600mAh%20(Purple)%202017-Charge
Conclusion
This looks like a very good high current cell and it can easily deliver the rated 25A current.
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
Compare to 18650 and other batteries

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