Test/review of Sanyo NCR20650A 3100mAh (Red)

[size=+3]Sanyo NCR20650A 3100mAh (Red)[/size]



Official specifications:

• Rated capacity: 2900mAh at 20°C
• Minimum capacity: 2950mAh at 25°C
• Typical capacity: 3100mAh at 25°C
• Nominal voltage: 3.6V
• Standard charge current: 2065mA
• Charge voltage: 4.20V
• Weight (max.): 55.4g
• Temperature: Charge: 10°C ~ 45°C, Discharge: -20°C ~ 60°C, Storage: -20°C ~ 50°C

This is one of the new formats for LiIon, this cell do not gain any extra capacity but can deliver a lot of current.










The discharge curves match perfectly and the capacity do not drop much at higher currents.







The cell gets hot at 30A, my log says 79°C















[size=+3]Conclusion[/size]

The cell is not a super cell, there ware limits to how much extra performance 2mm extra in diameter gets, but it is a very good high current cell (The next size up is 5mm longer and is better).

It is a very good cell, but do we really need this size (Check 21700)?



[size=+3]Notes and links[/size]

How is the test done and how to read the charts
How is a protected LiIon battery constructed
More about button top and flat top batteries
Compare to 18650 and other batteries
Compare to 26650 and other batteries

I can see this cell being used in power tool battery packs. But I am betting the 21700 and 20700 sizes will be more popular.

LG also has a 20650 cell available, the HG6

https://www.e-cigarette-forum.com/f...eat-true-30a-battery-but-only-2800mah.834503/

...In my testing it easily outperforms the excellent Sony VTC5A and runs cooler than the LG HB6. It is a great performing true 30A cell.

...Down to 3.2V the HG6 equals or beats by a little the Sanyo NCR20650A or iJoy 5-leg 20700. The Sanyo NCR20700A still beats all of them, but not by a lot.

...LG uses a cutoff voltage of 2.0V though for their capacity rating for this cell. If I ran them down to that level I think they would meet the 2900mAh minimum rating.

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