Efest 16340 850mAh (Black) 2014
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Official specifications:
- Min Capacity: 850 mAh
- Typical Capacity: 850 mAh
- Nominal Voltage: 3.70V
- Size: Max.16.63x33.98mm
- Weight: 25g
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The capacity is specified way to high as it usual is with 16340 batteries.
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The battery has a very stable capacity, independently of load. This is much better than last time I tested this battery.
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Conclusion
The battery does not have the highest capacity of 16340 batteries, but it does a good job in the 1A to 2A range, making it a good fit for many flashlights.
I will rate the battery as acceptable.
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