Keeppower 26650 4000mAh (Black)

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

The battery does easily meet the specified capacity.
Note: The internal resistance is calculated from 6 to 10 ampere.

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DSC_2675 DSC_2676

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

Lots of capacity, but the batteries has difference capacity especially at high loads.

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

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

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

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

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

The protection trips at a very high value, as can be seen the output of the batteries has started to go down, before the protection trips.

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



Conclusion

This is the first keeppower battery I have seen, where I am disappointed with it, the performance is good, but I do not like the difference between the cells and the very high trip point of the over current protection.



Notes and links

Keeppower is a OEM manufacturer, i.e. many of the batteries they produce is sold with other names on them.

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