Samsung INR21700-48G 4800mAh (Gray)

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Official specifications: Samsung%20INR21700-48G%204800mAh%20(Gray)-info

This is a high capacity cell in the new 21700 format.

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Samsung%20INR21700-48G%204800mAh%20(Gray)-Capacity

Nice tracking discharge curves with fairly constant capacity, but the cell cannot handle above 10A without heat problems, this is acceptable with a maximum rating of 9.6A
I only discharge the cell to 2.8V, not the rated 2.5V and get a bit less than full capacity.

Samsung%20INR21700-48G%204800mAh%20(Gray)-Temp-7.0

Samsung%20INR21700-48G%204800mAh%20(Gray)-Temp-10.0

Samsung%20INR21700-48G%204800mAh%20(Gray)-Temp-15.0

Battery gets to hot and i stop the discharge.

Samsung%20INR21700-48G%204800mAh%20(Gray)-CapacityTimeHours

Samsung%20INR21700-48G%204800mAh%20(Gray)-CapacityTime

Samsung%20INR21700-48G%204800mAh%20(Gray)-Energy

Samsung%20INR21700-48G%204800mAh%20(Gray)-PowerLoadTime

Samsung%20INR21700-48G%204800mAh%20(Gray)-TripCurrent

Samsung%20INR21700-48G%204800mAh%20(Gray)-Charge



Conclusion

This is highest capacity 21700 cell at the current time (Jan 2018) and it looks very good, but it is not designed for high current discharges or fast charging.



Notes and links

The cell was supplied by a reader for review.

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