Test/review of Samsung INR21700-48G 4800mAh (Gray)

HKJ · 04.01.2018, 20:59

Samsung INR21700-48G 4800mAh (Gray)

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.

Conclusion

This is highest capacity 21700 cell at the current time (Jan 201

and it looks very good, but it is not designed for high current discharges or fast charging.

Notes and links

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

04.01.2018, 20:59	1
HKJ Модератор своих разделов Регистрация: 03.07.2010 Последняя активность: 10.10.2022 08:53 Сообщений: 1652 Сказал(а) спасибо: 0 Поблагодарили: 2985 раз(а) в 1025 сообщениях	Test/review of Samsung INR21700-48G 4800mAh (Gray) Samsung INR21700-48G 4800mAh (Gray) 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. Conclusion This is highest capacity 21700 cell at the current time (Jan 201 and it looks very good, but it is not designed for high current discharges or fast charging. Notes and links 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 __________________ My website with reviews of charges, batteries and other stuff: http://www.lygte-info.dk/