Fenix 18650 ARB-L2 2600mAh (Black)
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Official specifications:
- 2600mAh large capcity with outstanding performance
- Triple overheat protection, safe and reliable
- Built-in over charge, over discharge protection circuits
- Circuit board has front and back protection for impact resistant
- No memory effect, negligible self discharge
- 3.6v 2600mAh
- Size 18.5mm x68mm, weight 49g
- Charging currect - Recommanded 1A, Max 2A
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The battery has a flat top, but due to the raised ring on the bottom it can be used in series.
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This battery has a high voltage at low loads and higher capacity than most other 2600 mAh rated batteries. There is also very good tracking between the batteries.
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Conclusion
The high voltage can be an advantage in smaller (i.e. 3-4 watt) lights where the battery replaces two CR123 cells.
With Fenix behind the battery I have no problem rating it as a good battery although it uses a unknown 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