Enercig 20700 4000mAh EC-27B (Red)

DSC_1832

Official specifications:

Enercig%2020700%204000mAh%20EC-27B%20(Red)-info

This is very good discharge curves, they track perfectly. The rated 15A discharge current looks very reasonable.

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DSC_1833 DSC_1834

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Enercig%2020700%204000mAh%20EC-27B%20(Red)-Capacity


Enercig%2020700%204000mAh%20EC-27B%20(Red)-Temp-10.0

Enercig%2020700%204000mAh%20EC-27B%20(Red)-Temp-15.0

Enercig%2020700%204000mAh%20EC-27B%20(Red)-Temp-20.0

At 20A the cell gets too hot and I had to stop the discharge.

Enercig%2020700%204000mAh%20EC-27B%20(Red)-CapacityTimeHours

Enercig%2020700%204000mAh%20EC-27B%20(Red)-CapacityTime

Enercig%2020700%204000mAh%20EC-27B%20(Red)-Energy

Enercig%2020700%204000mAh%20EC-27B%20(Red)-PowerLoadTime

Enercig%2020700%204000mAh%20EC-27B%20(Red)-TripCurrent

Enercig%2020700%204000mAh%20EC-27B%20(Red)-Charge



Conclusion

This size has more capacity and slightly higher voltage than 18650, without being much larger.
The cell is a very good.



Notes and links

The batteries was supplied by ENERDan 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