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Samsung Li-Ion 18650 3500mAh Battery (4)


$1,748.71 $2,057.97

Samsung INR18650-35E 3500mAh (Pink)

DATASHEET

DSC_3105

Official specifications:

  • Nominal capacity: 3500mAh
  • Minimum capacity: 3350mAh
  • Nominal voltage: 3,6V – 3,7V
  • Charging voltage: 4,2V
  • Discharge current: 8A
  • Maximum discharge current: 13A
  • Charge current: 0,6C 2000mA
  • Discharge end voltage: 2,65V
  • Pluspol: FlatTop
  • Chemistry: LiNiCoAlO2
  • Diameter: 18,55mm ± 0,1
  • Height: 65,25mm ± 0,15
  • Weight: 48g ± 1

Samsung%20INR18650-35E%203500mAh%20(Pink)-info

This is one of the new high capacity cells.

DSC_3104

DSC_3106 DSC_3107

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DSC_3109

Samsung%20INR18650-35E%203500mAh%20(Pink)-Capacity

The discharge curves has good tracking.
At 15A the B track stops just after 2.3Ah, this is because my battery holder melts (I hope this is fixed now).

Samsung%20INR18650-35E%203500mAh%20(Pink)-Temp-7.0

Samsung%20INR18650-35E%203500mAh%20(Pink)-Temp-10.0

Samsung%20INR18650-35E%203500mAh%20(Pink)-Temp-15.0

15A is definitly too high current for this cell. The cell temperature is above 75°C (25°C ambient + 50°C temperature raise). Logfile says 87°C for A cell.

Samsung%20INR18650-35E%203500mAh%20(Pink)-CapacityTimeHours

Samsung%20INR18650-35E%203500mAh%20(Pink)-CapacityTime

On this chart it is obvious how the heat improves the performance at 15A.

Samsung%20INR18650-35E%203500mAh%20(Pink)-Energy

Samsung%20INR18650-35E%203500mAh%20(Pink)-PowerLoadTime

Samsung%20INR18650-35E%203500mAh%20(Pink)-TripCurrent

Due to the melted battery holder I did only do this for one cell.

Samsung%20INR18650-35E%203500mAh%20(Pink)-Charge

Conclusion

The cell looks very good, it has lot of capacity and can handle some current, but I will not recommend it above 10A.

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
Compare to 18650 and other batteries

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