Efest IMR18650 3100mAh (Purple) 2014

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Official specifications:
Efest%20IMR18650%203100mAh%20(Purple)%202014-info

High power and high capacity in the Efest purple line of high current cells.

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Efest%20IMR18650%203100mAh%20(Purple)%202014-Capacity

Looking at this curve I will say that 20A is a bit high for continuous load, but 10A is handled very fine.

Efest%20IMR18650%203100mAh%20(Purple)%202014-CapacityTimeHours

Efest%20IMR18650%203100mAh%20(Purple)%202014-CapacityTime

Efest%20IMR18650%203100mAh%20(Purple)%202014-Energy

Efest%20IMR18650%203100mAh%20(Purple)%202014-PowerLoadTime

I had an accident during testing and I am missing one cell in some tests. The problem was that my load did not turn off after the 20A and discharged the cell completely.

Efest%20IMR18650%203100mAh%20(Purple)%202014-TripCurrent

Efest%20IMR18650%203100mAh%20(Purple)%202014-Charge



Conclusion

The cell cannot match the ultra high current cells in power, but easily surpass them in energy at 10A. This is very good performance.

I will call it a acceptable cell.



Notes and links

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