Intl-outdoor NCR18650 3100mAh (Blue)
This battery has been replaced by Intl-outdoor NCR18650 3100mAh (Black)



Official specifications:

• Panasonic 18650
• Capacity: 3100mAh
• Nominal voltage: 3.6V
• Full charge: 4.2V

The batteries arrived in an envelope without any other protection (intl-outdoor has informed me that they have changed to a better packing, see below).







The batteries shows nice discharge curves up to 2 ampere, but 3 and 5 ampere is stopped by the over current protection.









On this curve it can be seen that the protection on the two cells activates at different currents.



I uses 3 ampere as the minimum test current, but one of the batteries had a protection that activated at a lower current.





Conclusion

These batteries uses a very good Panasonic cell and as can be seen on the discharge curves the two batteries matches perfectly, but they only works up to 2 ampere, the protection stops the 3 ampere test.
It is a bit difficult to rate these cell, up to two ampere they are good cells, i.e. they will work perfectly in lights with a single XR-E, XP-E or XP-G led, but the batteries are useless in a XM-L light, due to the low protection threshold.

From intl-outdoor I have received this comment:
Limit will be changed in the next batch. Currently working with a different company for a new protected battery.



Notes and links

The batteries was supplied by intl-outdoor for review.

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


New packing use by intl-outdoor: