Test/review of Efest IMR26650 5000mAh (Purple) 2017

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Test/review of Efest IMR26650 5000mAh (Purple) 2017

Efest IMR26650 5000mAh (Purple) 2017

DSC_0322

Official specifications:


  • Rated capacity: 5000mAh
  • Nominal voltage: 3.7V
  • Voltage at end of discharging: 2.5V
  • Max. charging current: 4A
  • Standard charge: 2A
  • Discharging current 35A   This text is beside a photo of the cell showing 18A on Efest website
  • Pulse discharging current: 50A    This text is beside a photo of the cell showing 45A on Efest website
  • Charging temperature range: 0°C ~ 45°C
  • Discharging temperature range: -20°C ~ 75°C
  • Inner resistance: 20mOhm
  • Cell size: 26.5 (±0.2)mm x 65.2 (±0.2)mm

Efest%20IMR26650%205000mAh%20(Purple)%202017-info

A high current 26650 cell with good capacity.

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DSC_0323DSC_0324

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Efest%20IMR26650%205000mAh%20(Purple)%202017-Capacity

There is some capacity difference between the cells. They handle up to about 20A without much capacity loss.

Efest%20IMR26650%205000mAh%20(Purple)%202017-Temp-15.0

Efest%20IMR26650%205000mAh%20(Purple)%202017-Temp-20.0

At 20A they get hot.

Efest%20IMR26650%205000mAh%20(Purple)%202017-Temp-30.0

And at 30A I had to termiate the discharge due to temperature.

Efest%20IMR26650%205000mAh%20(Purple)%202017-CapacityTimeHours

Efest%20IMR26650%205000mAh%20(Purple)%202017-CapacityTime

Efest%20IMR26650%205000mAh%20(Purple)%202017-Energy

Efest%20IMR26650%205000mAh%20(Purple)%202017-PowerLoadTime

Efest%20IMR26650%205000mAh%20(Purple)%202017-TripCurrent

Efest%20IMR26650%205000mAh%20(Purple)%202017-Charge



Conclusion

This cell has good performance at higher currents and a fairly high capacity.



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): http://lygte-info.dk/