Tested at 10A-25A constant current. This cell was purchased from IMRBatteries and donated for testing. 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 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 selected 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.
Bottom Line
This is a 20A continuous discharge current (CDR) cell that runs undamaged at 20A but very hot. At 25A it hit my safety limit of 100°C. In my opinion this is not a 40A cell and you should not run it at above 20A.
Test Results
Comments
Disclaimer
The 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 selected 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.
Bottom Line
This is a 20A continuous discharge current (CDR) cell that runs undamaged at 20A but very hot. At 25A it hit my safety limit of 100°C. In my opinion this is not a 40A cell and you should not run it at above 20A.
Test Results
Comments
- At 20A the cell had a very high maximum temperature of 84°C.
- At 25A the cell reached a max temperature of 98°C which coasted to just a bit over 100°C after the test finished. This is a dangerously high temperature for a cell.
- Discharges were not done at 30A, 35A, or 40A due to the cell hitting my temperature safety limit of 100°C during the 20A test.
- An additional five cycles at 20A showed no damage at all so no follow-up 10A discharge (to confirm any damage) was done.
- I am setting a CDR of 20A for this cell. The cell runs hot at this current level but since it didn't show any signs of damage I think you will get decent cycle life at 20A. In my opinion you should not run this cell at above 20A!
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