UltraFire SJ18650 6000mAh (Black) 2015
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Official specifications:
- Color: Black
- Type: Rechargeable li-ion battery
- Model: 18650
- Voltage: 3.7V
- Capacity: 6000mAh
- Size: Approx. 6.6 * 1.8cm / 2.6 * 0.7in (Height * diameter)
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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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Mot much capacity, especially notif 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.
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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 badcell, 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