UltraFire SJ18650 6000mAh (Black)

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

This is a cheap battery from ebay with record breaking capacity according to its specifications. This is, of course, not correct.

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UltraFire%20SJ18650%206000mAh%20(Black)-Capacity

The battery can deliver about 1500mAh at low load, anything about 1A load is a problem and the two cells has different capacity.

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

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

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

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

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

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



Conclusion

There batteries are not very impressive, they can drive a low power flashlight, but only about half the time a good battery can.
Also remember that these batteries are unprotected.

I will rate this as a bad cell.



Notes and links

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