K2 Energy 14500 LiFePO4 500mAh (White)

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Official specifications:
K2%20Energy%2014500%20LiFePO4%20500mAh%20(White)-info

This is a LiFePO4 cell, this means lower charge voltage, less energy content and longer cell life.

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K2%20Energy%2014500%20LiFePO4%20500mAh%20(White)-Capacity

This type of chemistry has a very flat discharge curve and the two cells match nicely.

K2%20Energy%2014500%20LiFePO4%20500mAh%20(White)-Temp-7.0

K2%20Energy%2014500%20LiFePO4%20500mAh%20(White)-Temp-10.0

The temperature raise is not very high, even at 10A.

K2%20Energy%2014500%20LiFePO4%20500mAh%20(White)-Temp-15.0

At 15A there is no time for temperature raise, before my equipment cuts the discharge due to low voltage.

K2%20Energy%2014500%20LiFePO4%20500mAh%20(White)-CapacityTimeHours

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Conclusion

Depending on equipment the lower voltage may be an advantage or disadvantage, the capacity and energy is lower than normal LiIon. This chemistry is safer, because the self-ignition temperature is much higher.

For some applications this will be a good cell.


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
Comparison to other LiIon batteries