Tested at 10A-40A constant current and 30A-50A pulsed. These cells were donated for the purposes of testing thanks to the wonderful donations from so many of you. 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. 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.
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 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 batteries 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 just a 17A 3000mAh battery with wildly exaggerated ratings. At 15A down to 3.2V it delivers about 5% less capacity than the LG HG2. It also runs hotter than the HG2. Its appearance and performance are essentially identical to the Imren Purple 40A 3000mAh battery I tested earlier. I believe that this is just a rewrap of the Imren 3000mAh battery.
Continuous-Current Test Results
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.
Shootout with the Imren Purple 40A 3000mAh cell
Their performance is essentially identical except near the end of the discharge where the damage the purple Imren suffered during the 30A and 35A discharges shows up as a loss in capacity.
Comments
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 Safety Grades -- Picking a Safe Battery to Vape With | E-Cigarette Forum
26650 Safety Grades and Pulse Performance Data | E-Cigarette Forum
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. 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.
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 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 batteries 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 just a 17A 3000mAh battery with wildly exaggerated ratings. At 15A down to 3.2V it delivers about 5% less capacity than the LG HG2. It also runs hotter than the HG2. Its appearance and performance are essentially identical to the Imren Purple 40A 3000mAh battery I tested earlier. I believe that this is just a rewrap of the Imren 3000mAh battery.
Continuous-Current Test Results
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.
Shootout with the Imren Purple 40A 3000mAh cell
Their performance is essentially identical except near the end of the discharge where the damage the purple Imren suffered during the 30A and 35A discharges shows up as a loss in capacity.
Comments
- At 10A it reached 2850mAh. This is average to good performance for a 3000mAh-rated cell. I am rating this cell at 3000mAh.
- Its temperature at 15A was 73°C, a few degrees below the average for a cell operating at its CDR.
- At 20A the temperature rose to 90°C. This is several degrees above the upper limit of a battery operating at its CDR.
- At 25A the temperature rose to 106°C. This is a ridiculously high temperature for a battery operating at its CDR and is above my 100°C safety limit.
- Discharges at 30A and 35A were not done due the already dangerously high temperature at 25A.
- A discharge was done at 40A, the battery's rating. The voltage quickly collapsed below 3.2V making this cell essentially useless. This is clearly not a 40A cell.
- I am setting a CDR of 17A for this cell since at this current its operating temperature is at the average for a cell operating at its CDR. While operating any cell near its rated maximum current causes damage to the cell, I would expect decent cycle life from this cell at 17A.
- 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 Safety Grades -- Picking a Safe Battery to Vape With | E-Cigarette Forum
26650 Safety Grades and Pulse Performance Data | E-Cigarette Forum
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