Sanyo NCR20700B 4000mAh (Red)

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Official specifications:
Sanyo%20NCR20700B%204000mAh%20(Red)-info

This is a new battery size that is slightly larger than the common 18650 cell.

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Sanyo%20NCR20700B%204000mAh%20(Red)-Capacity

The discharge curves for the two cells track nicely.

Sanyo%20NCR20700B%204000mAh%20(Red)-Temp-10.0

Sanyo%20NCR20700B%204000mAh%20(Red)-Temp-15.0

Sanyo%20NCR20700B%204000mAh%20(Red)-Temp-20.0

One of the cells got really hot during the 20A discharge. With the other I probably forgot to place the thermo sensor on the battery.

Sanyo%20NCR20700B%204000mAh%20(Red)-CapacityTimeHours

Sanyo%20NCR20700B%204000mAh%20(Red)-CapacityTime

Sanyo%20NCR20700B%204000mAh%20(Red)-Energy

Sanyo%20NCR20700B%204000mAh%20(Red)-PowerLoadTime

Sanyo%20NCR20700B%204000mAh%20(Red)-TripCurrent

Sanyo%20NCR20700B%204000mAh%20(Red)-Charge



Conclusion

This size has more capacity and slightly higher voltage than 18650, without being much larger.
Being from Sanyo/Panasonic it is a ver good cell.



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