21700 Battery 5500mAh 3.6V Lithium-Ion Cell with 2C Discharge for High-Drain Devices
Brand Name:OiD
Certification:Complies with UN38.3, CE, RoHS, and IEC 62133 safety standards.
Model Number:21700
Minimum Order Quantity:100pcs
Delivery Time:3 ~ 30 days
Payment Terms:L/C,T/T,Western Union
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Shenzhen China
Address:
2# Building, Shimao Park, Zhenhuan Rd, Pingshan, Shenzhen, China.
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Product Details
Product Overview
The 21700 5500mAh lithium-ion rechargeable cell is a high-capacity cylindrical battery designed for applications requiring reliable power delivery across a wide temperature range. With robust performance characteristics and advanced safety features, this cell is ideal for use in high-drain devices, outdoor equipment, and low-temperature environments.
Key Electrical Parameters
| Parameter | Specification | Conditions |
|---|---|---|
| Nominal Capacity | 5500 mAh | Charge: 0.5C (2750 mA), CCCV, 4.2V, 0.02C cut-off; Discharge: 0.2C (1100 mA) to 2.5V |
| Minimum Capacity | 5350 mAh | |
| Nominal Voltage | 3.6 V | |
| Internal Resistance | ≤ 25 mΩ | AC Impedance, 1000 Hz |
| Charge Cut-off Voltage | 4.20 V | |
| Discharge Cut-off Voltage | 2.5 V | |
| Standard Charge Current | 0.5C (2750 mA) | |
| Standard Discharge Current | 1C (5500 mA) | |
| Max. Continuous Discharge Current | 2C (11000 mA) | 35°C > T ≥ 0°C |
| Operating Temperature | Charge: 0°C to 45°C; Discharge: -40°C to 60°C | |
| Dimensions | 21.65 ± 0.2 mm (Diameter), 70.95 ± 0.2 mm (Height) | |
| Weight | ≤ 73 g |
Performance Characteristics
Discharge Efficiency
| Rate | Current | Efficiency |
|---|---|---|
| 0.2C | 1100 mA | 100% |
| 0.5C | 2750 mA | ≥ 95% |
| 1C | 5500 mA | ≥ 93% |
| 2C | 11000 mA | ≥ 90% |
Cycle Life
- ≥ 70% capacity retention after 600 cycles (0.5C charge / 1C discharge, 4.2V–2.75V)
Low-Temperature Performance
| Temperature | Discharge Efficiency |
|---|---|
| -20°C (1C) | ≥ 80% |
| -30°C (0.5C) | ≥ 75% |
| -40°C (0.2C) | ≥ 60% |
Safety Features
- Overcharge, over-discharge, short-circuit, and drop protection
- Stable performance under extreme environmental conditions
- Complies with standard lithium-ion safety testing protocols
Applications
- High-drain portable devices
- Outdoor and low-temperature equipment
- Power banks and energy storage systems
- Medical and industrial devices
Notes
- All tests performed at 25±2°C and ≤ 85% RH unless otherwise specified.
- Discharge efficiency calculated relative to 0.2C discharge capacity.
21700 Battery 5500mAh 3.6V Lithium-Ion Cell with 2C Discharge for High-Drain Devices
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