HKJ
Flashaholic
[size=+3]Samsung INR21700-48G 4800mAh (Gray)[/size]
Official specifications:
This is a high capacity cell in the new 21700 format.
Nice tracking discharge curves with fairly constant capacity, but the cell cannot handle above 10A without heat problems, this is acceptable with a maximum rating of 9.6A
I only discharge the cell to 2.8V, not the rated 2.5V and get a bit less than full capacity.
Battery gets to hot and i stop the discharge.
[size=+3]Conclusion[/size]
This is highest capacity 21700 cell at the current time (Jan 2018) and it looks very good, but it is not designed for high current discharges or fast charging.
[size=+3]Notes and links[/size]
The cell was supplied by a reader for review.
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
Official specifications:
- Typical standard discharge capacity: 4800mAh
- Minimum standard discharge capacity: 4700mAh
- Typical standard discharge energy: 17.4Wh
- Minimum standard discharge energy: 17.04Wh
- Charging voltage: 4.20V
- Nominal voltage: 3.6V
- Standard charging current: 1440mA
- Rapid charging current: 4800mA (Not recommended for long life cycle)
- Max. discharge current: 9600mA (Not for cycle life)
- Max. pulse discharge current: 30A for 10sec, 25A for 30sec, 18A for 60sec
- Discharge cut-off voltage: 2.50V
- Operating temperature: Charge: 0° ~50°C, discharge -20° ~ 60°
- Storage temperature: 1 year: -20°C ~ 25°C, 3 months: -20°C ~ 45°C, 1 month: -20°C ~ 55°C
- Internal impedance: <35mOhm (AC 1kHz)
- Internal resistance: <50mOhm (DC)
- Cycle life: 500 cycles to 75% at 23°C or 70% at 45°C (Charge=0.3C, Discharge=1C)
This is a high capacity cell in the new 21700 format.
Nice tracking discharge curves with fairly constant capacity, but the cell cannot handle above 10A without heat problems, this is acceptable with a maximum rating of 9.6A
I only discharge the cell to 2.8V, not the rated 2.5V and get a bit less than full capacity.
Battery gets to hot and i stop the discharge.
[size=+3]Conclusion[/size]
This is highest capacity 21700 cell at the current time (Jan 2018) and it looks very good, but it is not designed for high current discharges or fast charging.
[size=+3]Notes and links[/size]
The cell was supplied by a reader for review.
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
