Sony VTC6 15A 3000mAh 18650 Bench Test Results...a great battery, equaling HG2/30Q

Discussion in 'Batteries and Chargers' started by Mooch, Jul 17, 2016.

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  1. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    These cells were donated for the purposes of testing by EnerCig in Germany. Thank you! To prevent any confusion with the eGo-type "batteries", I use the term "cell" here to refer to a single 18350, 18650, 26650, etc.

    While the test results are hard data, the conclusions and recommendations I make based on these tests are only my personal opinion based on my criteria for setting a rating. Carefully research any cell you are considering using before purchasing.

    Testing cells at their limits is dangerous and should never, ever, be attempted by anyone who has not thoroughly studied the dangers involved and how to minimize them.

    If the cell has only one current rating number on it, or if it says "max discharging current" then I have to assume that the company is stating that the cell can be discharged at that current level in any way, including continuously.

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    Bottom Line
    This is an great underrated cell that I am rating at 19A/3000mAh. The datasheet lists the max continuous current at 30A but that's only if you stop the discharge when the cell reaches 80°C, way before a continuous discharge has finished. The true continuous current rating from Sony is 15A. But at that current level the temperature is 72°C, about 6°C-9°C cooler than other batteries at their rating. This is why I feel it is underrated, like the Samsung 30Q, and why I have given it a 19A rating. It runs at a slightly higher voltage than both the 30Q and HG2 though.

    The 18650 ratings table has been updated to include this cell.

    A shootout between the HG2, 30Q, and VTC6 is now underway to see which is the best-performing 3000mAh and whether the ratings for the 30Q and/or HG2 need to be adjusted.

    Continuous-Current Test Results

    Pulsed-Current Test Results
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    VTC6 Ratings
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    • At 10A continuous it reached 2875mAh. This is great performance for 3000mAh cell at 10A so I am rating this cell at 3000mAh.
    • At 15A continuous the temperature rose to 72°C. This is a few degrees below the average temperature of a cell running at its continuous discharge rating (CDR).
    • At 20A continuous the temperature rose to 82°C. This is just a bit above the average temperature of a cell running at its CDR but within an acceptable range and is an indication that we are near the cell's true rating.
    • At 25A continuous the temperature rose to 98°C. This is a ridiculously high temperature and a strong sign that we're way above the cell's true rating.
    • I am setting a CDR of 19A for this cell. Operating at that level would bring the temperature near to the average for a cell operating at its CDR. While operating any cell near its rated maximum current level causes damage to the cell, I would expect decent cycle life from this cell at 19A continuous.
    • I have included pulsed discharges but I haven't set pass/fail standards for pulse testing yet. The discharges were done at 5sec on/30sec off, down to 2.5V. One chart shows the entire discharge at each level. The other chart is zoomed in to show the first 5 minutes to make it easier to see the voltage sag at different current levels.
    To see how other cells have tested and how hard you can safely push them, check out these links:
    List of Battery Tests | E-Cigarette Forum
    18350/18500 Safety Grades and Pulse Performance Data | E-Cigarette Forum
    18650 Battery Ratings -- Picking a Safe Battery to Vape With | E-Cigarette Forum
    26650 Safety Grades and Pulse Performance Data | E-Cigarette Forum
    DCBD, Ramsay Bolton, kostasb and 10 others like this.
  2. sonicbomb

    sonicbomb Vaping Master Verified Member ECF Veteran

    Feb 17, 2015
    1187 Hunterwasser
    Looking forward to the shootout results.
    WiSK and Mooch like this.
  3. WiSK

    WiSK Senior Member ECF Veteran

    Sep 15, 2015
    The Netherlands
    Finally the VTC6! :D
    Mooch likes this.
  4. Buck20

    Buck20 Full Member

    Dec 8, 2014
    Pretty much like a Samsung 30Q no?
  5. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015

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