Tested at 10A-25A constant current. Cells were graciously donated for testing by Liion Wholesale.
Dropbox - lg he2 20a 2500mah 18650 wrap.jpeg
Dropbox - lg he2 20a 2500mah 18650 can.jpeg
Dropbox - lg he2 20a 2500mah 18650 top.jpeg
Dropbox - lg he2 20a 2500mah 18650 bottom.jpeg
Disclaimer
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 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
Rated for 20A continuous discharge current (CDR) but runs pretty hot at that level. It's a 20A cell, but barely.
Test Results
Dropbox - lg he2 20a 2500mah 18650 constant-current tests.bmp
Comments
Dropbox - lg he2 20a 2500mah 18650 wrap.jpeg
Dropbox - lg he2 20a 2500mah 18650 can.jpeg
Dropbox - lg he2 20a 2500mah 18650 top.jpeg
Dropbox - lg he2 20a 2500mah 18650 bottom.jpeg
Disclaimer
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 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
Rated for 20A continuous discharge current (CDR) but runs pretty hot at that level. It's a 20A cell, but barely.
Test Results
Dropbox - lg he2 20a 2500mah 18650 constant-current tests.bmp
Comments
- Maximum temperature reached 85°C at 20A. This is 10°C hotter than the Samsung 25R and is the highest temperature I've seen for a 20A cell.
- Five additional cycles at 20A showed essentially no loss in capacity and no increased voltage sag. A 10A discharge done after this showed no loss in capacity indicating that the high temperatures seen during 20A discharges probably aren't affecting the cell's cycle life much.
- However, the high temperatures do reduce the safety margin before the cell vents or goes into thermal runaway.
- The HE2, to 3.2V at 20A, has about 30% less capacity than the Samsung 25R.
- Temperature rose to 96°C at 25A. That's way too hot, this is a 20A cell.
- While operating any cell near its rated maximum current causes damage to the cell, I would expect decent cycle life from the HE2 at 20A. I would not expect very good cycle life if using it at 25A and the possibility of venting increases significantly.
- See my blog for more information on the testing procedures and equipment used.
- A link to all my test results is in my signature, or see my blog.
