Efest 18350 900mAh (Black) 2014
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Official specifications:
- Brand/model: EFEST/18350 protected
- Spec: efest18350 900mAh 3.7V
- Material: Li-ion
- Weight(g): 55g
- Size(mm): 37.36(L)X18.49(D)
- Nominal voltage 3.7V
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The two cells has very different capacity, this is not very good.
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On this chart the difference in performance is very obvious.
I also wonder about the protection, one battery is below 2.5 volt, before the protection activates (it is probably the low volt protection, not the over current protection).
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Conclusion
One of the batteries has an acceptable performance, the other do not.
With this much difference between cells, I cannot recommend this battery.
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
Comparison to other LiIon batteries