UltraFire TR18650 5000mAh (Blue) 2018
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Official specifications:
- No memory effect, recharge up to 1000 cycles
- 100% brand new 18650 rechargeable batteries
- 100% quality Japanese battery cells
- 100% Q.C. of every battery
- Capacity: 5000mAh
- Voltage: 3.7 V
- Chemistry: Li-ion
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With the above specifications this must be good batteries? Or maybe not!
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The wrapper is, as usual, wrong, there is not PCB in these batteries.
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The batteries can deliver about 2A and has a capacity of 1100mA
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Conclusion
I have tested this battery a few years ago and it has not improved with time, it is slightly worse.
It is a bad battery, with wrong specifications. It is cheaper to buy good batteries!
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