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

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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 even a mid-to-high drain one.

    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

    My cell has the following marking: INR18650-30Q SAMSUNG SDI 136.

    The main specs from Samsung 30Q datasheet:
    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 using EB Tester Software's tool)

    Measured weight of the tested cell was 45.6g

    Samsung 30Q capacity test results:

    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:

    Check out my YouTube channel for batteries, chargers and other stuff reviews.
    I've launched my blog where you can find all my reviews in one place. Every new test/review will be first published on YouTube and in the blog. I'll be happy to see new subscribers, comments, suggestions and just your thoughts.

    Yep, Samsung 30Q is a great cell. Made 3 (5s9p) battery packs for my 1000w rear wheel.


      Hi. Is it right place I don’t know but I want to ask some question about the Samsung 30q 18650 battery. I bought today this product. Is that genuine or fake? Because I couldn’t see any brand label . Thank you


        There is no marking on the heat shrink tube?


          Looks fake. Tube should be printed on. Not a sticker label.