Tested at 10A-25A constant current. Cells were graciously donated for testing by Liion Wholesale. Thank you!
Cell code: K C5A1XXD05X
Dropbox - sony vtc5 wrap.jpeg
Dropbox - sony vtc5 top in wrap.jpeg
Dropbox - sony vtc5 can.jpeg
Dropbox - sony vtc5 top.jpeg
Dropbox - sony vtc5 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
A good 20A cell that delivers good capacity at an average temperature, but do not exceed 20A.
The Samsung 25R delivers a bit more capacity to 3.2V though and runs slightly cooler.
Test Results
Dropbox - sony vtc5 20a 2600mah 18650 constant-current tests.bmp
Comments
Cell code: K C5A1XXD05X
Dropbox - sony vtc5 wrap.jpeg
Dropbox - sony vtc5 top in wrap.jpeg
Dropbox - sony vtc5 can.jpeg
Dropbox - sony vtc5 top.jpeg
Dropbox - sony vtc5 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
A good 20A cell that delivers good capacity at an average temperature, but do not exceed 20A.
The Samsung 25R delivers a bit more capacity to 3.2V though and runs slightly cooler.
Test Results
Dropbox - sony vtc5 20a 2600mah 18650 constant-current tests.bmp
Comments
- At 10A the VTC5 reached 2375mAh. This is good performance.
- Maximum temperature reached 82°C at 20A. This is a bit hotter than the Samsung 25R but the same as the 30Q and HG2.
- Five additional cycles at 20A showed essentially no loss in capacity or additional voltage sag.
- A 10A discharge done after this actually showed an increase in voltage! Only averaging about 0.050V, but it's there. The cell was cycled three times at 5A before these tests started. This is the first cell I have seen that actually does need a few cycles at moderate current levels before reaching its full potential.
- There was no increase in voltage for a quick retest at 15A. That second 15A test is not included on the graph.
- Temperature rose to 96°C at 25A. That's way too hot for decent cycle life and significantly increases the chances of the cell venting. This is a 20A cell. Do not run it above 20A.
- While operating any cell near its rated maximum current causes some damage to the cell, I would expect decent cycle life from the VTC5 at 20A.
- See my blog for more information on the testing procedures, equipment used, and links to all my test results.
Last edited: