Efest IMR20700 3000mAh (Purple) 2017

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Official specifications:
Efest%20IMR20700%203000mAh%20(Purple)%202017-info

Efest do also have a battery in one of the new sizes that is slightly larger than 18650. The extra size is used for better high current handling in this cell

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Efest%20IMR20700%203000mAh%20(Purple)%202017-Capacity

The two batteries are not perfectly matched, there is a small difference. The batteries have fairly constant capacity at any current.

Efest%20IMR20700%203000mAh%20(Purple)%202017-Temp-15.0

Efest%20IMR20700%203000mAh%20(Purple)%202017-Temp-20.0

Efest%20IMR20700%203000mAh%20(Purple)%202017-Temp-30.0

At 30A they get very warm and I had to stop shortly before they where empty.

Efest%20IMR20700%203000mAh%20(Purple)%202017-CapacityTimeHours

Efest%20IMR20700%203000mAh%20(Purple)%202017-CapacityTime

Efest%20IMR20700%203000mAh%20(Purple)%202017-Energy

Efest%20IMR20700%203000mAh%20(Purple)%202017-PowerLoadTime

Efest%20IMR20700%203000mAh%20(Purple)%202017-TripCurrent

Efest%20IMR20700%203000mAh%20(Purple)%202017-Charge



Conclusion

This is a nice high current battery and the slightly large size compare to a 18650 can be seen on the improved performance.
This battery is mostly for people that needs well above 10A, for lower currents look at a 18650.



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