3.6V  Samsung-INR21700-50S Battery

INR21700-50S

The 21700 Samsung 50S(INR21700-50S) model is one of the newer models on the market. It could be used in high-performance devices, battery packs, E-Bikes, power tools, and more. It has a 5000mAh capacity and 25A maximum continuous discharge

HIGHLIGHTS OF Samsung INR21700 50S

  • Cut-off Voltage: 2.50V
  • Nominal Voltage: 3.60V
  • Max Voltage: 4.2V ± 0.05V
  • Nominal Capacity: 5000mAh (Max)
  • Max Continuous Rated Discharge: 25A
  • Max Non-Continuous Rated Discharge: 45A

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. 21.45 mm

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

Height :Max. 70.55 mm

Nominal Specification of Samsung-21700-50S

Item Specification
Standard discharge capacity Typ. 3,000mAh
Charge: 0.5C (2.5A), 4.20V, 0.05C(250mA)cut-off
Discharge: 0.2C (1A), 2.5V cut-off *1C=5,000mA
Rated discharge capacity Min. 4,800mAh
Charge: 1.2C(6A), 4.20V, 0.02C(100mA)cut-off
Discharge: 10A , 2.5V cut-off
Nominal voltage 3.6V
Standard charge CCCV, 2.5A, 4.2V, 250mA cut-off
Rated charge CCCV, 6A, 4.20 V, 100mA cut-off
Charging time Standard charge : 150min / 250mA cut-off(
Rated charge: 100min / 100mA cut-off
Max. continuous discharge(Surface Temperature) 25A(Without temperature cut)
45A(With 80℃ temperature cut)
Discharge cut-off voltage/End of discharge 2.5V
Max. charge current 10A (for step charge)
6A (continuous charge)
Cell weight 72.0g max
Cycle life ① Capacity ≥ 2,940mAh @ after 250cycles(60% of the standard capacity)
- Charge : 6A, 4.20V, CCCV 100mA cut-off
- Discharge: 25A , 2.5V cut-off
② Capacity ≥ 2,940mAh @ after 100cycles(60% of the standard capacity)
- Charge : 6A, 4.20V, CCCV 100mA cut-off
- Discharge: 45A, 2.5V cut-off
(80℃ cut-off, re-discharge release < 50℃)
Retention characteristics Capacity recovery(after the storage) ≥ 4,320 mAh(90% of the rated capacity @ RT)
- Charge : 6A, 4.20V, CCCV 100mA cut-off @ RT
- Storage : 30 days (@ 60℃)
- Discharge : 10A , 2.5V cut-off
Cell dimension Height : Max 70.62mm
Diameter : Max 21.25mm
Operating temperature( Ambient) Charge : 0 to 60℃
Discharge: -20 to 60℃
Operating temperature(*2 Surface) Charge : 0 to 60℃(recommended recharge release < 45℃)
Discharge: -20 to 80℃(must re-discharge release < 60℃)
Operating temperature(For safety certificate) Charge : -10 to 60℃
Recovery 90% after storage(*3) 1 year 0~25℃
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 Cell Specification.

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

Note (*3 ): If Cell is kept as ex-factory status (30% of charge), the capacity recovery rate shall be more than 90%

Characteristics

Standard charge

This ” Standard charge” means charging the cell CCCV with charge current 0.5C (2,500mA), constant voltage 4.2V and 250mA 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 1000mA(0.2C) with 2.5V cut-off at 23℃ within 1hour after the Standard charge. Which complying to the typical capacity of IEC61960 standard Typical capacity is the capacity considering production dispersion, and minimum capacity is allowed up to △2% of typical capacity.

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 ≥ 4,800mAh

Initial internal impedance

Initial internal impedance measured at AC 1kHz after Rated charge

Initial internal impedance ≤ 14mΩ

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℃
80% 85% 85% 100% 95%

Note:

If charge temperature and discharge temperature is not the same, the interval for temperature change is 3 hours. Percentage index of the discharge at 23℃ at 10A (=4,800mAh) 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 rated charge is as follows.

Charge temperature Discharge temperature
0℃ 5℃ 23℃ 45℃ 50℃ 60℃ 23℃
Relative capacity 90% 90% 100% 95% 95% 90%

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 rated discharge at 23℃ at 10A (=4,800mAh) is 100%.

How to Custom 21700 Battery Pack

We have the unique ability to develop custom 21700 battery pack to fit your needs. Our expert team of chemists, engineers, and manufacturers who use proven chemistry and production methods that will get from spec to production fast. Slim, flexible, more powerful.

WHAT WE CUSTOM

  • Custom Voltage Range: 3V ~ 120V
  • Custom Discharge Current: 0.2C ~ 120C (0.01A-1000A)

  • Custom BMS: Size, Features, Communication, Cut-off, Temperature
  • Custom Battery Size: Starting 0.5mm Thickness
  • Battery Temperature from -40°C–85°C
  • Custom Connector: JST/Molex/Hirose/Anderson/TE/Amphenol  Etc

WHY CHOOSE US

  • Custom 21700 Battery Pack, MOQ 100 pcs

  • Custom Samples as fast as 3 Days
  • Strict Quality Control, No Safety Concerns Ever
  • Instant Customer Support, Solve Any Problem in Time.
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