Efest 18650 2250mAh (Black)
Button top

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Official specifications:
Efest%2018650%202250mAh%20bt%20(Black)-info

This is the button top version, this means that a button has been added to the top of the cell, making it slightly longer.

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Efest%2018650%202250mAh%20bt%20(Black)-Capacity

Efest%2018650%202250mAh%20bt%20(Black)-CapacityTimeHours

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Efest%2018650%202250mAh%20bt%20(Black)-Energy

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Efest%2018650%202250mAh%20bt%20(Black)-TripCurrent

Efest%2018650%202250mAh%20bt%20(Black)-Charge



Flat top

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Official specifications:
Efest%2018650%202250mAh%20ft%20(Black)-info

The flat top version of the battery matches the 18x65 mm specification.

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Efest%2018650%202250mAh%20ft%20(Black)-Capacity

Efest%2018650%202250mAh%20ft%20(Black)-CapacityTimeHours

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Efest%2018650%202250mAh%20ft%20(Black)-Energy

Efest%2018650%202250mAh%20ft%20(Black)-PowerLoadTime

Efest%2018650%202250mAh%20ft%20(Black)-TripCurrent

Efest%2018650%202250mAh%20ft%20(Black)-Charge



Conclusion

Efest does not specify the actual cell used, but the capacity specifications and discharger curves matches the a Panasonic cell, making this a very good battery.



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