UltraFire SJ18650 6000mAh (Black) 2015

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Official specifications:
UltraFire%20SJ18650%206000mAh%20(Black)%202015-info

The cell is not surprisingly significantly below specified capacity. The promised protection is missing.

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The wrapper says that the battery is protection, this is not correct.
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UltraFire%20SJ18650%206000mAh%20(Black)%202015-Capacity

Not much capacity, especially not if you need a couple of amperes. This cell has less capacity than the 2014 version of the same cell. The two cells do track, but not very well.

UltraFire%20SJ18650%206000mAh%20(Black)%202015-CapacityTimeHours

UltraFire%20SJ18650%206000mAh%20(Black)%202015-CapacityTime

UltraFire%20SJ18650%206000mAh%20(Black)%202015-Energy

UltraFire%20SJ18650%206000mAh%20(Black)%202015-PowerLoadTime

UltraFire%20SJ18650%206000mAh%20(Black)%202015-TripCurrent

UltraFire%20SJ18650%206000mAh%20(Black)%202015-Charge



Conclusion

A cheap cell in bad quality, but I did already know that before I tested the cell. The disassembly did also confirm it (see link below).
The rating is, of course, that it is a bad cell, but in another way than the red/silver Ultrafire I also disassembled. This cell is produced to be cheap, the red/silver is made from old cell.



Notes and links

Last years review of same cell
I disassembled the battery to see whats inside

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