Test/Review of Efest IMR18650 1600mAh V1 (Red) 2014

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HKJ
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Test/Review of Efest IMR18650 1600mAh V1 (Red) 2014
Efest IMR18650 1600mAh V1 (Red) 2014

DSC_4105

Official specifications:
  • Top: flat top
  • Bottom: non-procted
  • Typical Capacity: 1600mAh
  • Min capacity: 1600mAh
  • Max discharge current: 30A (20C)
  • quick charge current: 1600mA (1C)
  • Quick discharge current: 1600mA (10C)
  • cycle life: 500 times
  • Charge cut-off voltage 4.2V ± 0.5V
  • Charge cut-off current 0.01C 5A(at CV mode)
  • Initial Impedance Max: 18mOhm
  • Discharge cut-off voltage 3.0V
  • Temperature: dishcarge temperature range:-10°C—60°C
  • Charge temperature range: 0°C—40°C
  • Storage: 1 year:-20°C—25°C, 3 months:-20°C—45°C, 1 month:-20°C—60°C
  • Weight: 50g
  • Length: 64.91 mm
  • Diamter: 18.34 mm

Efest%20IMR18650%201600mAh%20V1%20(Red)%202014-info

A IMR cell that can deliver a lot of current.

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DSC_4106 DSC_4107

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Efest%20IMR18650%201600mAh%20V1%20(Red)%202014-Capacity

The cell is rated for 30A, but it does struggle at 20A and above.

Efest%20IMR18650%201600mAh%20V1%20(Red)%202014-CapacityTimeHours

Efest%20IMR18650%201600mAh%20V1%20(Red)%202014-CapacityTime

Efest%20IMR18650%201600mAh%20V1%20(Red)%202014-Energy

Efest%20IMR18650%201600mAh%20V1%20(Red)%202014-PowerLoadTime

Efest%20IMR18650%201600mAh%20V1%20(Red)%202014-TripCurrent

Efest%20IMR18650%201600mAh%20V1%20(Red)%202014-Charge



Conclusion

The cell is acceptable for a high power IMR cell.



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/

djozz
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Joined: 09/07/2012 - 17:04
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Location: Amsterdam

Thanks for the review.

(hmm, I just got inspired to make a huge output red led flashlight)

Tom E
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Joined: 08/19/2012 - 08:23
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Thanx HKJ! Looks like the 20R is still king of the 18650's though for performance, and nice to have the extra capacity of the 20R.