Keeppower 18650 2800mAh (Black)

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Official specifications:
Keeppower%2018650%202800mAh%20(Black)%204.3V-info

This battery is not the usual 4.2 volt charging, but needs 4.3 volt charging, i.e. a special charger must be used (Some hobby chargers can be adjusted for it).

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Keeppower%2018650%202800mAh%20(Black)%204.3V-Capacity

The capacity is slightly below 2800mAh, but very constant at different loads. The battery has a high voltage, but not higher than the best 4.2 volt batteries. Where it is better is runtime at high voltage.

Keeppower%2018650%202800mAh%20(Black)%204.3V-CapacityTimeHours

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Keeppower%2018650%202800mAh%20(Black)%204.3V-Energy

Keeppower%2018650%202800mAh%20(Black)%204.3V-PowerLoadTime

Keeppower%2018650%202800mAh%20(Black)%204.3V-TripCurrent

Keeppower%2018650%202800mAh%20(Black)%204.3V-Charge



Test with 4.2 volt charging

It is possible and perfectly safe to use this battery with 4.2 volt, but it will have less capacity.

Keeppower%2018650%202800mAh%20(Black)-info

When only charging to 4.2 volt the battery looses about 200mAh in capacity.

Keeppower%2018650%202800mAh%20(Black)-Capacity

Keeppower%2018650%202800mAh%20(Black)-CapacityTimeHours

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Keeppower%2018650%202800mAh%20(Black)-Energy

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Keeppower%2018650%202800mAh%20(Black)-TripCurrent

Keeppower%2018650%202800mAh%20(Black)-Charge



Conclusion

That battery uses a good cell and does what is supposed to do, this makes it a very good battery.
But the requirement for a special charger to get the full benefit of the battery, does reduce the usefulness of it. Using it with a 4.2 volt charger negates any benefit of the higher voltage and capacity.



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