Keeppower 18650 3100mAh (Black)

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Official specifications:
Keeppower%2018650%203100mAh%20(Black)-info

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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Keeppower%2018650%203100mAh%20(Black)-Capacity

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

Keeppower%2018650%203100mAh%20(Black)-CapacityTimeHours

Keeppower%2018650%203100mAh%20(Black)-CapacityTime

Keeppower%2018650%203100mAh%20(Black)-Energy

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Keeppower%2018650%203100mAh%20(Black)-TripCurrent

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Conclusion

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

All in all a very good battery.