Intl-outdoor NCR18650B 3400mAh (Black)

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Official specifications:
Intl-outdoor%20NCR18650B%203400mAh%20(Black)-info

This is the latest cells from Panasonic with the highest capacity.
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.

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Very nice tracking between the two batteries and these batteries are good at both low and higher current.

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Conclusion

This battery has higher capacity and better high current capacity than its predecessor (3100mAh/NCR18650A).
With the added protection it is a very good battery.