Samsung ICR18650-28A 2800mAh (Purple)

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Official specifications:
Samsung%20ICR18650-28A%202800mAh%20(Purple)%204.3V-info

This battery is not the usual 4.2 volt charging, but needs 4.3 volt charging, i.e. a special charger must be used (Some hobby chargers can be adjusted for it).

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Samsung%20ICR18650-28A%202800mAh%20(Purple)%204.3V-Capacity

The cell has a higher voltage than most other batteries.

Samsung%20ICR18650-28A%202800mAh%20(Purple)%204.3V-CapacityTimeHours

Samsung%20ICR18650-28A%202800mAh%20(Purple)%204.3V-CapacityTime

Samsung%20ICR18650-28A%202800mAh%20(Purple)%204.3V-Energy

Samsung%20ICR18650-28A%202800mAh%20(Purple)%204.3V-PowerLoadTime

Samsung%20ICR18650-28A%202800mAh%20(Purple)%204.3V-TripCurrent

Samsung%20ICR18650-28A%202800mAh%20(Purple)%204.3V-Charge





Test with 4.2 volt charging

It is possible and perfectly safe to use this battery with 4.2 volt, but it will have less capacity.

Samsung%20ICR18650-28A%202800mAh%20(Purple)-info

When only charging to 4.2 volt the battery looses about 220mAh in capacity.

Samsung%20ICR18650-28A%202800mAh%20(Purple)-Capacity

Samsung%20ICR18650-28A%202800mAh%20(Purple)-CapacityTimeHours

Samsung%20ICR18650-28A%202800mAh%20(Purple)-CapacityTime

Samsung%20ICR18650-28A%202800mAh%20(Purple)-Energy

Samsung%20ICR18650-28A%202800mAh%20(Purple)-PowerLoadTime

Samsung%20ICR18650-28A%202800mAh%20(Purple)-TripCurrent

Samsung%20ICR18650-28A%202800mAh%20(Purple)-Charge



Conclusion

That is a good cell, but the requirement for a special charger to get the full benefit of the battery, does reduce the usefulness of it. Using it with a 4.2 volt charger negates any benefit of the higher voltage and capacity.



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