Sanyo NCR20700B 4000mAh (Red)
- Rated capacity: 4000mAH
- Minimum capacity: 4050mAh
- Typical capacity: 4250mAh
- Nominal voltage: 3.6V
- Discharge current: 15A
- Charging voltage: 4.20V
- Standard charging current: 2000mA
- Temperature: Charge: 10°C ~ 45°C, discharge: -20°C ~ 60°C, storage -20°C ~ 50°C
This is a new battery size that is slightly larger than the common 18650 cell.
The discharge curves for the two cells track nicely.
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.
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