3.6V  Samsung-INR21700-40T Battery

INR21700-40T

The Samsung INR21700 40T battery comes up with a standard  discharge capacity of 4000mAh, the voltage of 3.6V .

This is an absolutely excellent cell for anyone seeking high performance 21700 cells.

HIGHLIGHTS OF Samsung INR21700 40T

Rated discharge capacity: 3900mAh
Standard discharge capacity: 4000mAh
Nominal voltage: 3.6V
Standard charge: CCCV, 2A, 4.20V, 200mA cut-off
Rated charge: CCCV, 6A, 4.20V, 100mA cut-off
Max. continuous discharge: 35A with temperature cut.
Max. continuous discharge: 45A with 80°C temperature cut.
Discharge cut-off voltage: 2.5V
Cycle life: 250 cycles to 60% at 6A charge and 35A discharge.

MIND

Do not incinerate;
Do not disassemble;
Do not short positive and negative contacts;
Do not expose to heat;
Do not completely discharge;
Do not use force to install a li-ion battery;
Use only high quality battery charger;
Charge fully before first use;
Store in cold and dry place at approximately nominal voltage

APPEARANCE

There shall be no such defects as deep scratch, crack, rust, discoloration or leakage, which may adversely affect the commercial value of the cell.
Diameter : Max. 21.22 mm

Diameter is defined as the largest data value measured on the “A” area of a cylindrical cell.

Height :Max. 70.30 mm

   

Samsung INR21700-30T 3000mAh

Nominal Specification of Samsung-21700-40T

Item Specification
Standard discharge capacity Min. 4,000mAh
Charge: 0.5C(2A), 4.20V, 0.05C(200mA) cut-off
Discharge: 0.2C(800mA), 2.5V cut-off
Rated discharge capacity Min. 3,900 mAh
Charge:1.5C(6A), 4.20V, 0.025C(100mA)cut-off
Discharge: 10A, 2.5V cut-off
Nominal voltage 3.6V
Standard charge CCCV, 2A, 4.20 V, 200mA cut-off
Rated charge CCCV, 6A, 4.20 V, 100mA cut-off
Charging time Standard charge : 180min / 200mA cut-off
Rated charge: 70min / 100mA cut-off
Max. continuous discharge(Surface Temperature) 35A(Without temperature cut)
45A(With 80℃ temperature cut)
Discharge cut-off voltage/End of discharge 2.5V (End of discharge)
Cycle life Capacity ≥ 2,400mAh after 250cycles (60% of the standard capacity )
Charge : 6A, 4.20V, CCCV 100mA cut-off
Discharge: 35A , 2.5V cut-off
Cell weight 70.0g max
Cell dimension Height : Max 70.30mm
Diameter : Max. 21.22 mm
Operating temperature( surface temperature) Charge : 0 to 50℃ (recommended recharge release < 45℃)
Discharge: -20 to 80℃ (must re-discharge release < 60℃)
Operating temperature(Ambient) Charge : 0 to 45℃
Discharge: -20 to 60℃
Storage Temperature 1 year: -20~25℃
3 months : 0~45℃
1 month : 0~60℃

Note:

1.Protection function of the battery pack should be set within the specified charge, discharge and temperature range in the Cell Specification.

2. Discharge OTP(over temp. protection) should not be over 80℃ of the cell surface temperature. Protection set should be based on the location of the cell surface with the  highest temp increase part of the battery pack.

3.If the cell is kept as ex-factory status (30% of charge), the capacity recovery rate is more than 90%.

Characteristics

Standard Charge

This ” Standard charge” means charging the cell CCCV with charge current 0.5C (2,000mA), constant voltage 4.2V and 200mA cut-off in CV mode at 23℃ for capacity.

Rated charge

Rated charge means charging the cell CCCV with charge current 6A and 100mA cut-off at 23℃

Standard Discharge Capacity

The Standard discharge capacity is the initial discharge capacity of the cell, which is measured with discharge current of 800mA(0.2C) with 2.5V cut-off at 23℃ within 1hour after the Standard charge.

Standard discharge capacity ≥ 4,000mAh Which complying to the minimum capacity of IEC61960 standard

Rated discharge capacity

The rated discharge is the discharge capacity of the cell, which is measured with discharge current of 10A with 2.5V cut-off at 23℃ within 1hour after the rated charge.

Rated discharge capacity ≥ 3,900mAh

Initial internal impedance

Initial internal impedance measured at AC 1kHz after Standard charge. Initial internal impedance ≤ 12mΩ

Temperature Dependence of Discharge Capacity

Capacity comparison at each temperature, measured with discharge constant current 10A and 2.5V cut-off after the rated charge is as follows.

Discharge temperature
-20℃ -10℃ 0°C 23°C 60℃
60% 75% 80% 100% 95%

Note:

If charge temperature and discharge temperature is not the same, the interval for temperature change is 3 hours. Percentage as an index of the Standard discharge capacity (=3,900mAh) is 100%

Temperature Dependence of Charge Capacity

Capacity comparison at each temperature, measured with discharge constant current 10A and 2.5V cut-off after the standard charge is as follows.

Charge temperature Discharge temperature
0℃ 5℃ 23℃ 45℃ 50℃ 23℃
Relative capacity 80% 90% 100% 95% 95%

Note:

If charge temperature and discharge temperature is not the same, the interval for temperature change is 3 hours. Percentage as an index of the Standard discharge capacity (=3,900mAh) is 100%.

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