Samsung INR18650-35E 3500mAh (Pink)
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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
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This is one of the new high capacity cells.
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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).
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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.
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On this chart it is obvious how the heat improves the performance at 15A.
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Due to the melted battery holder I did only do this for one cell.
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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