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
The Sanyo 20700A is the second newly available 20mm x 70mm cell I have tested. The first was the 20700B (Sanyo 20700B 4000mAh 20700 Bench Test Results...a peek at the future?), a great high capacity cell I rated at 15A 4000mAh. At 10A-15A it runs about 25% longer than the LG HG2.
This 20700A is a true high performance cell that I am rating at a cool-running 30A 3100mAh. It performed well against the top 18650 cells for performance, vaping time, and safety (high amp rating). The 20700A...
...hits as hard as the Sony VTC5A at the start and easily holds its voltage up higher for considerably longer.
...runs about 20% longer than the VTC6 at 20A continuous down to 3.2V.
...runs 5°C cooler than the LG HB6 at 20A continuous and for about 230% longer. Yes, 230%.
While this cell will only fit in a custom battery sled it did just fit in the xtar and Efest chargers I tested it in. I cannot say if it will fit in any 18650 charger. Otherwise it's charged at 4.2V just like our 18650's. It's "standard" charging rate is 2.2A so 2A charging is no problem and won't decrease its overall life.
Here's the datasheet: https://www.imrbatteries.com/content/sanyo_ncr20700a.pdf
The two cells I tested were donated by IMRBatteries (www.imrbatteries.com). Thank you!
Continuous-Current Test Results
Pulse-Current Test Results
Comparison against other batteries
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
The Sanyo 20700A is the second newly available 20mm x 70mm cell I have tested. The first was the 20700B (Sanyo 20700B 4000mAh 20700 Bench Test Results...a peek at the future?), a great high capacity cell I rated at 15A 4000mAh. At 10A-15A it runs about 25% longer than the LG HG2.
This 20700A is a true high performance cell that I am rating at a cool-running 30A 3100mAh. It performed well against the top 18650 cells for performance, vaping time, and safety (high amp rating). The 20700A...
...hits as hard as the Sony VTC5A at the start and easily holds its voltage up higher for considerably longer.
...runs about 20% longer than the VTC6 at 20A continuous down to 3.2V.
...runs 5°C cooler than the LG HB6 at 20A continuous and for about 230% longer. Yes, 230%.
While this cell will only fit in a custom battery sled it did just fit in the xtar and Efest chargers I tested it in. I cannot say if it will fit in any 18650 charger. Otherwise it's charged at 4.2V just like our 18650's. It's "standard" charging rate is 2.2A so 2A charging is no problem and won't decrease its overall life.
Here's the datasheet: https://www.imrbatteries.com/content/sanyo_ncr20700a.pdf
The two cells I tested were donated by IMRBatteries (www.imrbatteries.com). Thank you!
Continuous-Current Test Results
Pulse-Current Test Results
Comparison against other batteries
Comments
- At 10A continuous it reached 2941mAh. This is good performance for a 3100mAh cell at 10A so I am rating it at 3100mAh.
- At 30A continuous the temperature rose to 75°C. This is just below the average temperature for a cell being discharged at its continuous discharge rating (CDR) but the datasheet seems to show a higher sensitivity to temperature than our 18650's so I am not giving it a rating above 30A.
- I am setting a CDR of 30A for this cell. While operating any cell near its rated maximum current level causes damage, I would expect decent cycle life at 30A 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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