INR21700-5000 21700 Li-ion Cell – 5000mAh, 3.6V, 18Wh
The INR21700-5000 (50T) is a high-capacity, high-discharge cylindrical lithium-ion cell from Jiangsu SunPower. It is built for demanding battery packs that need both long runtime and strong current delivery.
We keep large stock and offer favorable pricing for bulk orders.
Key Highlights
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5000mAh rated capacity, 18Wh nominal energy
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3.6V nominal voltage
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4.20V max charge voltage, 2.5V discharge cut-off
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10A max charge current
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20A continuous discharge without temperature cut
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50A continuous discharge with 75°C temperature cut
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100A pulse discharge for 2 seconds
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Low AC impedance: ≤12.0mΩ
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Stable cycle life and strong temperature performance
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Ideal for high-power packs, energy storage, and portable power systems
Specifications
| Item | Specification |
|---|---|
| Model | INR21700-5000 / 50T |
| Cell type | Cylindrical lithium-ion cell |
| Rated capacity | 5000mAh |
| Minimum capacity | 5000mAh at 0.1C; 4900mAh at 0.2C |
| Nominal voltage | 3.6V |
| Rated energy | 18Wh |
| Max charge voltage | 4.20V ± 0.05V |
| Discharge cut-off voltage | 2.5V |
| Standard charge | 2.5A CC-CV to 4.20V, 100mA cut-off |
| Recommended charge current | 2.5A |
| Max charge current | 10A |
| Charge time | 180 min at 25±3°C |
| Max continuous discharge | 20A without temp cut; 50A with 75°C cut |
| Max pulse discharge | 100A for 2s |
| Diameter | 21.25 ± 0.15mm with PET |
| Height | 70.30 ± 0.20mm with PET |
| Weight | ≤73g |
| AC impedance | ≤12.0mΩ at 1000Hz, 30% SOC |
| Pack consistency | ΔVoltage ≤10mV; ΔImpedance ≤2mΩ; ΔCapacity ≤1% |
| Ex-factory voltage | 3.50V–3.65V |
| Warranty | 12 months from manufacturing code |
Performance You Can Count On
The cell delivers ≥4800mAh at 10A discharge at room temperature.
At 25±3°C, 10A discharge is used as the 100% reference. Relative capacity is ≥95% at 15A, ≥95% at 20A, ≥93% at 30A, and ≥85% at 40A.
Temperature performance is also strong: ≥80% at -20°C, ≥85% at -10°C, ≥85% at 0°C, and ≥95% at 60°C.
Cycle life options include:
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10A charge / 10A discharge: ≥80% after 300 cycles
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5A charge / 25A discharge: ≥60% after 300 cycles
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5A charge / 35A discharge with 75°C cut: ≥60% after 100 cycles
Safety and Environmental Testing
The INR21700-5000 is tested for overcharge, forced discharge, short circuit, crush, and 130°C heating. It meets no fire, no explosion requirements under these tests.
It also passes low-pressure, free-drop, vibration, and thermal cycling tests. This makes it suitable for tough applications where reliability matters.
Storage and Handling
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Operating temperature: charge 0°C–45°C ambient / 0°C–50°C surface; discharge -20°C–60°C ambient / -20°C–80°C surface
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Storage temperature: 3 months at -20°C–45°C; 1 year at -20°C–25°C
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Long-term storage voltage: 3.5V–3.7V
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For storage over 3 months, recharge every 3 months at 0.5C to 3.65V
This is a bare lithium-ion cell. It must be used with a proper BMS and protection circuit. Always follow voltage, current, and temperature limits. Do not use damaged cells. Do not mix with other brands or chemistries.
Packaging
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80 pcs per inner box
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4 inner boxes per carton
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320 pcs per carton
Large Stock, Favorable Pricing
We have large inventory ready for shipment. Whether you need samples, small batches, or volume orders, we can support your production schedule with competitive pricing.
Contact us for current stock, bulk pricing, MOQ, lead time, and shipping options.
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