Sanyo UR18650NSX 20A 2500mAh 18650 Bench Test Results...a great 22A battery, about equal to the 25R5

Discussion in 'Batteries and Chargers' started by Mooch, Mar 24, 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 Illumination Supply, LLC (www.illumn.com). Thank you! To prevent any confusion with the eGo-type "batteries", I use the term "cell" here to refer to a single 18650, 26650, etc.


    Disclaimer
    The statements, conclusions, and recommendations I make based on these tests are only my personal opinion. Carefully research any battery 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.


    A note regarding current ratings and my testing
    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.

    image.jpeg image.jpeg image.jpeg image.jpeg


    Bottom Line
    This is a great 2500mAh battery, testing out at 22A continuous. Its voltage under load is a bit lower than the Samsung 25R5 but the Sanyo runs a bit cooler and longer. It can be pulsed at up to about 50A before its voltage gets uselessly low.


    Continuous-Current Test Results
    image.png


    Pulsed-Current Test Results
    These tests are done to show the performance of the cell at higher pulsed current levels. If you are running your mod at these levels be aware that you risk overheating, and possibly venting, the battery if there is a malfunction or accidental pressing of your mechanical mod's button.
    image.png image.png


    Comments
    • At 10A continuous it reached about 2350mAh. This is good performance for a 2500mAh-rated cell operating at 10A so I am rating this cell at 2500mAh.
    • At 15A continuous the temperature rose to 63°C. This is significantly below the average temperature for a cell operating at its continuous discharge rating (CDR).
    • At 20A continuous the temperature rose to 75°C. This is a bit below the average temperature for a cell operating at its CDR, indicating that we're discharging at near the cell's CDR.
    • At 25A continuous the temperature rose to 85°C. This is several degrees above the average temperature for a cell operating at its CDR, indicating that we're discharging at above the cell's rating.
    • At 30A continuous the temperature rose to 89°C. This is much too high a temperature for a cell operating at its CDR.
    • Two more discharges at 30A continuous showed almost no damage to the cell.
    • At 35A continuous the temperature rose to 98°C, almost reaching my 100°C safety limit. The voltage and capacity have still not started collapsing like with so many other batteries.
    • I am setting a CDR of 22A for this cell since at this current level the operating temperature is at 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 good cycle life from this cell at 22A 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 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
     
  2. sonicbomb

    sonicbomb Vaping Master Verified Member ECF Veteran

    Feb 17, 2015
    1187 Hunterwasser
    A good one from Sanyo, nice one.
     
    Mooch likes this.
  3. Konstantinos Kazantzoglou

    Konstantinos Kazantzoglou Full Member

    Mar 20, 2016
    Athens Greece
    Great Review as always, I was wondering if there could be a long term test for Vape Compatible Batteries (after 100 or after 200 Charge-Discharge Cycles).
    This will determine the capability of a battery in the long run.
     
    Mooch likes this.
  4. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    They're easy to do but take weeks to months to finish and tie up the test equipment all that time. :)
     
  5. Konstantinos Kazantzoglou

    Konstantinos Kazantzoglou Full Member

    Mar 20, 2016
    Athens Greece
    You're right, what I'm currently doing is keeping track of my charge discharge rotation cycle in an MS Excel sheet for all my Reuleaux RX200 batteries (LG HE2 Group 3A, Panasonic 18650B Group 3B, Samsung 25R2 Group 3C, LG HG2 Group 3D) but due to the fact that I rotate these groups I'm still in 12 cycles :yawn: Long way to go yet :)
     
    sinbadthesailor and Mooch like this.
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