Efest IMR26650 4200mAh (Purple) 2017

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Official specifications:
Efest%20IMR26650%204200mAh%20(Purple)%202017-info

This is a high current 26650 battery.

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Efest%20IMR26650%204200mAh%20(Purple)%202017-Capacity

It do fairly good up to 20A, at 30A the cell is struggling a to handle the current.

Efest%20IMR26650%204200mAh%20(Purple)%202017-Temp-20.0

Efest%20IMR26650%204200mAh%20(Purple)%202017-Temp-30.0

At 30A I had to terminate the discharge a bit premature due to high temperature (I only had sensor on the B cell).

Efest%20IMR26650%204200mAh%20(Purple)%202017-CapacityTimeHours

Efest%20IMR26650%204200mAh%20(Purple)%202017-CapacityTime

Efest%20IMR26650%204200mAh%20(Purple)%202017-Energy

Efest%20IMR26650%204200mAh%20(Purple)%202017-PowerLoadTime

Efest%20IMR26650%204200mAh%20(Purple)%202017-TripCurrent

Efest%20IMR26650%204200mAh%20(Purple)%202017-Charge



Conclusion

This is a fairly good high current cell, but the rating is on the optimistic side.



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