EnerCig TN26650HP-3400 3400mAh 26650 Bench Test Results...a hard-hitting 25A battery

[Mooch]

These cells were donated for the purposes of testing by Nkon (www.nkon.nl, ru.nkon.nl for the US). Thank you! 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 great, hard-hitting 26650 cell which exceeds its 23.8A continuous rating. I rate it at 25A/3500mA. While it has less capacity than the top 26650's like the Basen and Brillipower 4500mAh cells, it hits a bit harder than both of them. This helps to offset some of the difference in capacity when used in a regulated mod and would make the EnerCig the better choice for an unregulated/mechanical mod. Its length is 65.9mm and its width is 26.2mm.

The 26650 ratings table has been updated to include this cell.


Continuous-Current Test Results



Pulsed-Current Test Results



Comments

• At 10A continuous it reached 3439mAh. This is too high for a 3400mAh cell but good for a 3500mAh cell at 10A so I am rating this cell at 3500mAh.
• At 15A continuous the temperature rose to 58°C. This is way below the average temperature of a cell running at its continuous discharge rating (CDR).
• At 20A continuous the temperature rose to 69°C. This is below the average temperature of a cell running at its CDR.
• At 25A continuous the temperature rose to 78°C. This is the average temperature of a cell running at its CDR and an indication that we are at the cell's true rating.
• At 30A continuous the temperature rose to 84°C. This is too hot for a cell operating at its CDR.
• At 35A continuous the temperature rose to 87°C. This is too hot for a cell operating at its CDR and the voltage is sagging significantly.
• I am setting a CDR of 25A for this cell. While operating any cell near its rated maximum current level causes damage to the cell, I would expect decent cycle life from this cell at 20A continuous.
• 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
18350/18500 Safety Grades and Pulse Performance Data | E-Cigarette Forum
18650 Battery Ratings -- Picking a Safe Battery to Vape With | E-Cigarette Forum
26650 Safety Grades and Pulse Performance Data | E-Cigarette Forum

 

[sonicbomb]

Ooh a good one, top work feller.