UltraFire BRC18650 3000mAh (Red-silver)

These batteries are sold from many China shops, I have tested from 3 different shops and there is wide differences and none of the batteries are good.

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Official specifications:
UltraFire%20BRC18650%203000mAh%20(Red-silver)-info

These batteries are from the UltraFire shop that insists that they sell genuine UltraFire with good quality.

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UltraFire%20BRC18650%203000mAh%20(Red-silver)-Capacity

The two batteries has a huge difference in capacity, especially at low currents.

UltraFire%20BRC18650%203000mAh%20(Red-silver)-CapacityTimeHours

UltraFire%20BRC18650%203000mAh%20(Red-silver)-CapacityTime

UltraFire%20BRC18650%203000mAh%20(Red-silver)-Energy

UltraFire%20BRC18650%203000mAh%20(Red-silver)-PowerLoadTime

UltraFire%20BRC18650%203000mAh%20(Red-silver)-TripCurrent

It does not look like this battery has a over current protection or maybe it is at a higher current than the battery can supply. The A battery failed after one test.


UltraFire%20BRC18650%203000mAh%20(Red-silver)-Charge



UltraFire BRC18650 3000mAh (Red-silver) cnq

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Official specifications:
UltraFire%20BRC18650%203000mAh%20(Red-silver)%20cnq-info

This is the most expensive UltraFire 3000mAh than cnq has, these are supposed to genuine UltraFire.

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UltraFire%20BRC18650%203000mAh%20(Red-silver)%20cnq-Capacity

The two batteries has a huge difference in capacity, especially at low currents.

UltraFire%20BRC18650%203000mAh%20(Red-silver)%20cnq-CapacityTimeHours

UltraFire%20BRC18650%203000mAh%20(Red-silver)%20cnq-CapacityTime

UltraFire%20BRC18650%203000mAh%20(Red-silver)%20cnq-Energy

UltraFire%20BRC18650%203000mAh%20(Red-silver)%20cnq-PowerLoadTime

UltraFire%20BRC18650%203000mAh%20(Red-silver)%20cnq-TripCurrent

It does not look like this battery has a over current protection or maybe it is at a higher current than the battery can supply. The A battery failed after one test.


UltraFire%20BRC18650%203000mAh%20(Red-silver)%20cnq-Charge



UltraFire BRC18650 3000mAh (Red-silver) DX

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Official specifications:
UltraFire%20BRC18650%203000mAh%20(Red-silver)%20DX-info

These UltraFire does not have the same performance as the two other pairs.

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UltraFire%20BRC18650%203000mAh%20(Red-silver)%20DX-Capacity

There is a fairly good match between the batteries.

UltraFire%20BRC18650%203000mAh%20(Red-silver)%20DX-CapacityTimeHours

UltraFire%20BRC18650%203000mAh%20(Red-silver)%20DX-CapacityTime

UltraFire%20BRC18650%203000mAh%20(Red-silver)%20DX-Energy

UltraFire%20BRC18650%203000mAh%20(Red-silver)%20DX-PowerLoadTime

UltraFire%20BRC18650%203000mAh%20(Red-silver)%20DX-TripCurrent

On these UltraFire the protection works.

UltraFire%20BRC18650%203000mAh%20(Red-silver)%20DX-Charge



Conclusion

The genuine UltraFire batteries are not very good with very different capacity and problems with the protection circuit, the DX version is better (At least the ones I got). None of the batteries are close to the rated capacity.
The internal resistance is also way to high for the genuine batteries.
I will rate these batteries as BAD, the DX ones are acceptable for a cheap battery, but because there is many different UltraFire 3000mAh on the market, I would not trust them.



Notes and links

Due to the wide difference between batteries from the same dealer, I have not included them in the charts, but only in the comparator.

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