GTF NCR18650B 3400mAh (Green)
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Official specifications:
- Cell Type: Li-ion
- Battery type: NCR18650B
- Capacity: 3100-3400 mAh
- Voltage: 3.7V
- Size: Ø18mm x 65 mm
- Weight: About 48g
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This 18650 battery uses a type number and wrap color for a Panasonic 18650 3400mAh battery.
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The two cells do not have the same capacity, it is not that surprising when the specifications says 3100-3400mAh. The can deliver 5 to 7A
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/GTF%20NCR18650B%203400mAh%20(Green)-CapacityTimeHours.png)
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/GTF%20NCR18650B%203400mAh%20(Green)-PowerLoadTime.png)
/GTF%20NCR18650B%203400mAh%20(Green)-TripCurrent.png)
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Conclusion
The cells are not bad cells, but due to the mismatch I will not recommend using them in series.
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
Graphical comparison to 18650 and other batteries
Table with all tested LiIon batteries