LG HB6 30A 1500mAh 18650 Bench Retest Results...a fantastic 30A battery, but low capacity

Discussion in 'Batteries and Chargers' started by Mooch, Nov 23, 2015.

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  1. Mooch

    Mooch Electron Wrangler Verified Member ECF Veteran

    Supporting member
    May 13, 2015
    Tested at 10A-40A constant current and 30A-60A pulsed. These cells were purchased by me and used only for testing thanks to the incredible donations many of you made. 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 batteries 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. My safety precautions are the ones I have elected to take and you should not assume they will protect you if you attempt to do any testing. Do the research and create your own testing methods and safety precautions.

    image.jpg image.jpg image.jpg image.jpg

    A note regarding current ratings and my testing
    If the cell has only one current rating on it then I have to assume that the company is stating that the cell can be discharged at that current level in any way, including continuous. Otherwise they would have listed the current rating with two numbers as other companies have done. Or they would have labeled the rating on the wrap as "pulse" or "burst". Battery buyers should not have to hunt down what the number on the wrap means. I will be testing cells at the rating listed on the wrap and pointing out when they fail to meet that listed rating.


    Bottom Line
    In my opinion, this is an fantastic performing true 30A continuous discharge current (CDR) cell that runs cooler than any other cell at high discharge rates. It can be pulsed (5s on/30s off) at up to 50A without problems but its small capacity means that the voltage starts dropping soon.


    Continuous-Current Test Results
    image.jpg


    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.jpg image.jpg


    Comments
    • At 10A it reached about 1250mAh. This is average performance for a 1500mAh-rated cell at 10A.
    • At 15A, 20A, and 25A the maximum temperature reached 57°C, 65°C, and 73°C. This is below the average temperature of a cell operating at its continuous discharge rating (CDR).
    • At 30A the maximum temperature reached 77°C. This is equal to the average temperature of a cell operating at its CDR.
    • At 35A the temperature rose to 83°C. This is at the upper limit for a cell operating at its CDR. The voltage is sagging a lot at this current level though.
    • At 40A the temperature rose to only 84°C. While the cell is not overheating at 40A its voltage has dropped too far to be useful.
    • Two more 30A discharges showed that some damage was done at 40A. The voltage really started sagging at that level indicating that the cell was being stressed beyond its capabilities.
    • I am setting a CDR of 30A for this cell. Its temperature at this level was the same as a Samsung 25R at 20A. While operating any cell near its rated maximum current causes damage to the cell, I would expect decent cycle life from this cell at 30A.
    • I have included pulsed discharges but I haven't set pass/fail standards for pulse testing yet. The discharges were done at 30A-60A, 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
    18650 Safety Grades -- Picking a Safe Battery to Vape With | E-Cigarette Forum
     
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