Keeppower 18650 3500mAh (Black) 2015

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Official specifications:
Keeppower%2018650%203500mAh%20(Black)%202015-info

This is a protected high capacity cell.

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Keeppower%2018650%203500mAh%20(Black)%202015-Capacity

Very nice curves with good tracking. On one of the cells the overload protection trips during a 7A discharge.
My result is below rated capacity, some of the reason is probably because I terminate charge a bit early (100mA instead of 50mA) and do not discharge to 2.5 volt, only to 2.8 volt.

Keeppower%2018650%203500mAh%20(Black)%202015-CapacityTimeHours

Keeppower%2018650%203500mAh%20(Black)%202015-CapacityTime

Keeppower%2018650%203500mAh%20(Black)%202015-Energy

Keeppower%2018650%203500mAh%20(Black)%202015-PowerLoadTime

Keeppower%2018650%203500mAh%20(Black)%202015-TripCurrent

Keeppower%2018650%203500mAh%20(Black)%202015-Charge



Conclusion

This cell has about the same capacity as a 3400mAh cell, but handles load a bit better.
I will rate this cell very good.



Notes and links

The batteries was supplied by Keeppower 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