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EnerCig EC-C6 25A 3000mAh 18650 Bench Test Results...a fantastic battery, Sony VTC6 rewrap

Discussion in 'Batteries and Chargers' started by Mooch, Jul 25, 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 fantastic performing cell that I am rating at 19A/3000mAh. It is a rewrap of the Sony VTC6, a great high-capacity cell. It is rated at 25A by EnerCig but they are lowering that based on testing of the VTC6. EnerCig is releasing the EC-C6 with a thicker, tougher wrap to help prevent damage. The wrap adds about 0.2mm to the diameter of the cell. This isn't much but it should be mentioned as mods that are already a tight fit for most cells might have trouble fitting these.

    The EnerCig cells are only available in Germany right now (www.intaste.de and www.dampfdorado.de) but they hope to have their cells available in the US soon. This is especially good news as the VTC5A is an incredible cell but is only available from a couple of vendors worldwide.

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


    Continuous-Current Test Results
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    Pulsed-Current Test Results
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    Comments
    • At 10A continuous it reached 2856mAh. This is good performance for 3000mAh cell at 10A so I am rating this cell at 3000mAh.
    • At 15A continuous the temperature rose to 71°C. This is a few degrees below the average temperature of a cell running at its CDR and an indication that we are near the cell's true rating.
    • At 20A continuous the temperature rose to 83°C. This is a bit above the average temperature of a cell running at its CDR but within limits and is an indication that we are near, but a touch above, 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
     
    MikeyConti, sonicbomb and KenD like this.
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