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Test/Review of Samsung ICR18650-30B 3000mAh (Green)
Samsung ICR18650-30B 3000mAh (Green)
Official specifications:
Test with 4.35 volt charging These cells are high capacity cells with moderate current capability. The higher voltage means more energy. The discharge curves looks nice, good tracking and nearly constant capacity. The cell has a little trouble with the 7A track, it heats up a bit and this improves the performance. Test with 4.3 volt charging Reducing the charge voltage to 4.30 volt means losing about 100-150mAh. The slightly lower voltage makes the discharge curve be more load independent. Test with 4.20 volt charging At 4.2 volt charging the loss is about 400mAh compared to 4.35 volt. The independence of load is also present at 4.2 volt. Conclusion This cell has a more flat discharge curve than some high capacity cells, this means higher voltage at the last part of the discharge at any charge voltage. The initial part of the discharge will be higher when charged from 4.35 volt (only at low loads). It is a very good cell, but requires a 4.35V charger for best performance. Notes and links For 4.35 volt chargers check my chargers reviews, Xtar has a some: WP2h, VP2, SP1. 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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