Sanyo NCR20650A 3100mAh (Red)



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















Conclusion

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)?



Notes and links

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