Intl-Outdoor UR18650FM 2600mAh (Black)
Official specifications:
- Sanyo 18650 Protected Battery
- Protected against Overdischarge, Overcharge and Short-circuit
- Capacity: 2600mAh
- Recommended Max Discharge: 5.2A (2C)
- Full charge: 4.2V
- Nominal voltage: 3.7V
- Cut-off: 2.75V
This battery has a high voltage at low loads.
Conclusion
The high voltage can be an advantage in smaller (i.e. 3-4 watt) lights where the battery replaces two CR123 cells.
It is a very good battery.