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Bench Retest Results: Samsung 30Q 3000mAh 18650…a great 15A/20 battery!

Discussion in 'Batteries and Chargers' started by Mooch, Jan 15, 2018.

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  1. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    These tests below only note the estimated ratings for these batteries at the time I tested them. Any battery that is not a genuine Samsung, Sony, LG, Panasonic, or Sanyo can change at any time! This is one of the hazards of using “rewrapped” or batteries from other manufacturers so carefully research any battery you are considering using before purchasing.

    Misusing or mishandling lithium-ion batteries can pose a SERIOUS RISK of personal injury or property damage. They are not meant to be used outside of a protected battery pack. Never exceed the battery’s current rating and keep the plastic wrap and top insulating ring in perfect condition.

    Testing batteries at their limits is dangerous and should never, ever, be attempted by anyone who has not thoroughly studied the dangers involved, understands the risks, has the proper equipment, and takes all appropriate safety precautions.

    If the battery has only one current rating number, or if it only says "max", then I have to assume the battery is rated at that current level for any type of discharge, including continuous.

    69A81A37-0BF8-4795-BF9D-FE946A532DD1.jpeg D0C4C2D0-2201-4D1B-862B-278C3CD4E657.jpeg 025CE953-F07D-471E-B503-3EA3AFC896DD.jpeg DA6D30F2-6A09-4FC4-A1D9-18EAD6889238.jpeg

    Bottom Line
    Please read: Conditionally extending the Samsung 30Q’s rating to 20A

    This is a retest of the popular Samsung 30Q. The four cells I tested, two from IMRBatteries and two from Illumn, showed the expected great consistency in performance.

    The Samsung 30Q datasheet (Section 7.9) mentions operation at 20A. Operation at that level can be done as long as we don’t let the battery get above 75°C, its maximum rated operating temperature.

    But this is not a high performance “power” cell, designed for high current. It is a high capacity “energy” cell designed for low to moderate power levels and long running time. At higher current levels the voltage sag and power loss in the cell are huge. Do not exceed 20A.

    I am giving this cell a continuous current rating of 15A (about 45W using 3.7V) and a temperature-limited rating of 20A (about 60W if using 3.7V) as long as the cell is never allowed to reach 75°C.

    This is not a “pulse rating”! There is no pulse length, time between pulses, or criteria used for setting such a rating being defined. The 20A rating is any type of discharge as long as the 75°C limit is not reached.

    The 18650 rating table has been updated with the 15A/20A rating for this cell.

    A “shootout” of the HG2, 30Q, and VTC6, directly comparing their performance, will be posted in a few days.

    Four cells were purchased for the purposes of testing by me.

    Continuous Current Discharge Graphs
    E643149E-5767-4C82-846C-16F705C11AD0.jpeg AE5B6CF3-030A-4C16-855A-6672059D9645.jpeg

    Ratings Graphic

    Datasheet section 7.9

    Performance Specs
    DC Internal Resistance = 22.1mOhms (milliohms) average for the four cells.
    Total energy delivered down to 3.2V at 10A continuous = 7.53Wh (Watt-hours) average
    Total energy delivered down to 3.2V at 15A continuous = 6.31Wh (Watt-hours) average

    To see how other cells have tested check out this link:
    • Like Like x 11
    • Informative Informative x 3
  2. stols001

    stols001 Moved On ECF Veteran

    May 30, 2017
    Thank you once again, Mooch :)

    • Agree Agree x 2
    • Like Like x 1
  3. gerrymi

    gerrymi Vaping Master ECF Veteran

    Supporting member
    Jul 12, 2013
    The 'Burgh, PA.
    ANXIOUSLY awaiting...:headbang:

    • Like Like x 2
  4. Vape Magoo

    Vape Magoo Super Member ECF Veteran

    Dec 3, 2017
    Good to see an average resistance level added. Hope to see new tests on 18650GA and MJ1 soon.
    • Like Like x 2
  5. Robin Becker

    Robin Becker Senior Member ECF Veteran

    Feb 3, 2018
    I like the 30Q more than its direct competitors HG2 and the VTC6. Heard lots of people complaining about the color of the 30Q :)...but who cares?
    I like the performance of the 30Q at can discharge the battery easily even below the freezing point, so no need to vape at home.
    • Like Like x 1
    • Useful Useful x 1
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