Sanyo UR18650FB 2400mAh (Red)
Official specifications:
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Nominal capacity: 2400mAh
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Nominal voltage: 3.70V
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Charging: 2400mA to 4.2V
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Maximum discharge current: 4800mA
This is a old “high capacity” cell.
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/Sanyo%20UR18650FB%202400mAh%20(Red)-Capacity.png)
The discharge curves tracks nicely, but the cell cannot deliver more than about 2C, i.e. about 5A.
/Sanyo%20UR18650FB%202400mAh%20(Red)-Temp-5.0.png)
/Sanyo%20UR18650FB%202400mAh%20(Red)-Temp-7.0.png)
/Sanyo%20UR18650FB%202400mAh%20(Red)-Temp-10.0.png)
/Sanyo%20UR18650FB%202400mAh%20(Red)-CapacityTimeHours.png)
/Sanyo%20UR18650FB%202400mAh%20(Red)-CapacityTime.png)
/Sanyo%20UR18650FB%202400mAh%20(Red)-Energy.png)
/Sanyo%20UR18650FB%202400mAh%20(Red)-PowerLoadTime.png)
/Sanyo%20UR18650FB%202400mAh%20(Red)-TripCurrent.png)
/Sanyo%20UR18650FB%202400mAh%20(Red)-Charge.png)
Conclusion
This cell may have been a very good cell when it was made, but it is way behind a modern cell in both capacity and current.
Notes and links
Vapcell told me that I was missing some cells in my comparator and they would be happy to supply them.
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
Compare to 18650 and other batteries