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.
Bottom Line
This is a rewrapped and preposterously overrated 10A cell reaching 94°C at only 15A continuous and becoming useless at only 20A. Both Kdest cells were visually identical in performance and appearance to the LG MG1. This is the same cell that was used by Efest for the 10A version of their earlier "35A 3000mAh" cell.
Kdest has printed "MADE IN KDEST" on the metal can which is interesting considering that this is a rewrapped LG cell.
The 18650 ratings table has been updated to include this cell.
The two cells were purchased directly from Kdest (Kdest) for the purposes of testing.
Continuous-Current Test Results
Pulse-Current Test Results
Comments
List of Battery Tests | E-Cigarette Forum
https://www.e-cigarette-forum.com/f...afety-grades-and-pulse-performance-data.7566/
https://www.e-cigarette-forum.com/f...des-picking-a-safe-battery-to-vape-with.7447/
https://www.e-cigarette-forum.com/f...fety-grades-and-pulse-performance-data.7554//
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.
Bottom Line
This is a rewrapped and preposterously overrated 10A cell reaching 94°C at only 15A continuous and becoming useless at only 20A. Both Kdest cells were visually identical in performance and appearance to the LG MG1. This is the same cell that was used by Efest for the 10A version of their earlier "35A 3000mAh" cell.
Kdest has printed "MADE IN KDEST" on the metal can which is interesting considering that this is a rewrapped LG cell.
The 18650 ratings table has been updated to include this cell.
The two cells were purchased directly from Kdest (Kdest) for the purposes of testing.
Continuous-Current Test Results
Pulse-Current Test Results
Comments
- At 10A continuous it reached 2542mAh. This is average performance for a 2800mAh high internal resistance cell at 10A so I am rating it at 2800mAh.
- At 15A continuous the temperature rose to 94°C. This is way above the average temperature of a cell operating at its continuous discharge rating (CDR). This is an indication that we are operating above its true rating.
- At 20A continuous the voltage very quickly dropped to 3.2V, delivering only 141mAh.
- At 25A continuous and higher the battery was essentially useless. This is obviously not a 35A cell.
- I am setting a CDR of 10A for this cell. While operating any cell near its rated maximum current level causes damage, I would expect ok cycle life at 10A continuous.
List of Battery Tests | E-Cigarette Forum
https://www.e-cigarette-forum.com/f...afety-grades-and-pulse-performance-data.7566/
https://www.e-cigarette-forum.com/f...des-picking-a-safe-battery-to-vape-with.7447/
https://www.e-cigarette-forum.com/f...fety-grades-and-pulse-performance-data.7554//
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