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Samsung INR21700-58E4

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The Samsung INR21700-58E4 is a high-capacity 21700 lithium-ion cell with 5,500 mAh (20 Wh) and 3.636 V nominal voltage. It supports 0.2C standard charging, 1C max charge, and 2C continuous discharge. With over 500 cycles at 75% retention, it’s ideal for energy storage and long-runtime, moderate-drain applications.

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Standard discharge capacity (*5) Min. 5,500 mAh (20Wh)
- Charge : 0.2C, 4.2 V, 0.01C cut-off @RT
- Discharge : 0.2C, 2.50 V cut-off @RT
※1C = 5,500 mA
Charging Voltage 4.2 V
Cell Weight 74 g max
Nominal Voltage 3.636 V
Charging Method CC-CV (constant voltage with limited current)
Charging Time

Standard charge: 0.2C

For cycle life : 0.5C

Max Charge Current

Max Discharge Current

 Standard Charge: 7 hours
Discharge Cut-off Voltage

1C (not for cycle life)

2C (for continuous discharge)

3C (not for continuous discharge)

2.5 V (End of discharge)
Cycle life Capacity ≥ 4,136 mAh @ after 500cycles
(75% of the Standard capacity @ RT)
- Charge : 0.5C, 4.2 V, CCCV 0.05C cut-off @ RT
- Discharge: 1C , 2.50 V cut-off @ RT
Storage characteristics  Capacity recovery(after the storage) ≥ 4,797 mAh
(85% of the Standard capacity @ RT)
- Charge : 0.5C, 4.2 V, 0.02C cut-off @ RT
- Storage : 20 days (@ 60℃)
- Discharge : 0.2C , 2.50 V cut-off @ RT
Cell Dimension Height : Max. 71.00 mm
Diameter: Max. Φ 21.78 mm
Operating Temperature (*3) Charge : 0 to 45°C (Ambient) 3.14 Operating Temperature (*3) Discharge : -20 to 60°C (Ambient)
Recovery 80% after storage (*4)

1 year -20~23℃

3 months -20~45℃

1 month -20~60℃

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Samsung INR21700-58E4

Samsung INR21700-58E4

The Samsung INR21700-58E4 is a high-capacity 21700 lithium-ion cell with 5,500 mAh (20 Wh) and 3.636 V nominal voltage. It supports 0.2C standard charging, 1C max charge, and 2C continuous discharge. With over 500 cycles at 75% retention, it’s ideal for energy storage and long-runtime, moderate-drain applications.

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