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Samsung 30Q - high drain 18650 Li-ion cell's capacity test

Samsung INR18650-30Q is a high capacity 3000mAh Li-ion cell of 18650 size which supports continuous discharge at up to 15A. It's can be called a high drain cell or a mid-to-high drain one.
Samsung 30Q INR18650-30Q - high drain 18650 Li-ion cell battery capacity test

The battery was bought from my reliable supplier (Queen Battery) and tested with ZKETECH EBC-A20 and a self-made battery holder. It's a PC-connected battery tester supporting 4-wire measuring and discharging at up to 20A.

I've used version 3.0 of my battery holder based on 0.5mm thick pure copper terminals

I've followed all the prescriptions of the IEC61960-2003 standard concerning battery's capacity measurement. Before each discharging cycle each battery was charged at standard charge current mentioned in its datasheet to charge end voltage. Before each discharging or charging i've held a 1-1.5hrs pause. The environment temperature was 23.0-24.5°C. To be sure in results i've done each test minimum twice (usually 3-4 times).


Samsung INR18650-30Q

The cell is marked as INR18650-30Q SAMSUNG SDI 136.
Samsung 30Q INR18650-30Q - high drain 18650 Li-ion cell battery capacity test

The main specs from Samsung 30Q datasheet (pdf):
Nominal capacity: 3000mAh
Nominal voltage: 3.6V
Standard charge current: 1.5A / 150mA cut-off
Maximum charge current: 4A / 100mA cut-off
Charge end voltage: 4.20V
Max. continuous discharge current: 15A (5C)
Discharge cut-off voltage: 2.5V
AC impedance at 1KHz: ≤26mΩ
Max weight: 48g

Measured initial DC IR at 3A in fully charged condition was 16.0±0.7mΩ

Measured weight of the tested cell was 45.6g
Samsung 30Q INR18650-30Q - high drain 18650 Li-ion cell battery capacity test

Samsung 30Q capacity test results:
Samsung 30Q INR18650-30Q - high drain 18650 Li-ion cell battery capacity test
At 0.2C (0.6A) 30Q's capacity appeared to be a bit higher than 3100mAh vs 3000mAh declared - a nice start but no surprise. All the way up to 15A it remains above 2900mAh and the curves look excellent. 2.5V discharge cut-off is another advantage which allows to use a wider voltage range. 30Q is a good high drain cell which is a high capacity one at the same time - that's why it's so popular.

Here is the video version of this review:
Samsung 30Q INR18650-30Q - high drain 18650 Li-ion cell battery capacity test

Check out my YouTube channel for batteries, chargers and other stuff reviews.

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