Keeppower 26650 4000mAh (Black) 2014

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Official specifications:
Keeppower%2026650%204000mAh%20(Black)%202014-info

The battery has good performance, but the over current protection does not work as expected.

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Keeppower%2026650%204000mAh%20(Black)%202014-Capacity

The battery does easily live up to its rated 4000mAh and the two batteries has good tracking up to 7A.

Keeppower%2026650%204000mAh%20(Black)%202014-CapacityTimeHours

Keeppower%2026650%204000mAh%20(Black)%202014-CapacityTime

Keeppower%2026650%204000mAh%20(Black)%202014-Energy

Keeppower%2026650%204000mAh%20(Black)%202014-PowerLoadTime

Keeppower%2026650%204000mAh%20(Black)%202014-TripCurrent

The protection does not trip, I asked Keeppower about it and they told me the protection was at around 20A. This is way to high for this battery.
The over discharge and over charge protection is still supposed to work correctly.

Keeppower%2026650%204000mAh%20(Black)%202014-Charge



Conclusion

This battery has good performance up to 7A, but the missing over current protection does reduce the safety some.



Notes and links

The battery 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