Intl-outdoor NCR18650A 3100mAh (Black)



Official specifications:

• Panasonic 18650A
• Capacity: 3100mAh
• Recommended Max Discharge: 6.2A (2C)
• Full charge: 4.2V
• Nominal voltage: 3.6V
• Cut-off: 2.5V

The cell used can be discharged down to 2.5 volt, in my test I only discharges to 2.8 volt, i.e. I do not measure the full capacity. But then, not all lights will be able to use the full capacity.
Note: The tested batteries are samples, on the production version the diameter might be slightly less.










Each chart has curves for two batteries, but these batteries are nearly identical in performance and the curves are on top of each other.















Conclusion

This battery uses a good cell, this secures many things:

• The batteries does match in capacity, i.e. they can be used in series.
• The battery is very safe.
• The battery has the specified capacity.

The battery has a very high current limit (Like many other 3100 batteries), this does not mean it can sustain this high current.
All in all a very good 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

The batteries was supplied by intl-outdoor for review.