High-quality 21700-4800, suitable for power tools portable devices and small electronic products A reliable Chinese supplier of single-cell rechargeable lithium-ion batteries.
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Our 21700 lithium-ion single cell battery pack adopts original EVE INR21700/50E 5Ah cylindrical cell, equipped with customized integrated BMS protection board and nickel tab welding. This finished battery module has stable 3.7V nominal voltage, 4800mAh rated capacity and 17.76Wh rated energy, supporting fast charging and high-current discharge. Built-in multi-protection circuit safeguards overcharge, over-discharge, over-current and short circuit, ideal for power tools, portable power equipment, mini lighting devices and consumer electronics.
| NO. | Items | Specifications | Remarks |
|---|---|---|---|
| 1 | Cell Model | 21700-3.7V-5Ah | Single cylindrical cell |
| 2 | Nominal Voltage | 3.7V | Finished battery pack |
| 3 | Rated Capacity | 4800mAh | Tested under 0.2C discharge |
| 4 | Rated Energy | 17.76Wh | - |
| 5 | Internal Impedance | ＜200mΩ | Tested at 25±2°C, 1KHz AC |
| 6 | Shipment Voltage | ≥3.85V | Factory delivery status |
| 7 | Recommended Charging Current | 960mA | Standard charging rate |
| 8 | Max Charging Current | 2A | Charging temp range: 5~45°C, max charging voltage 4.2V |
| 9 | Charging Cut-off Voltage | 4.2V | CC/CV constant current & constant voltage charging mode |
| 10 | Upper Charging Limit Voltage | 4.25V | Overcharge protection threshold |
| 11 | Recommended Discharge Current | 960mA | Standard load output |
| 12 | Max Continuous Discharge Current | 6A | Discharge limit 2.8V under 5~45°C; 2.8V limit under -10~60°C |
| 13 | Discharge Cut-off Voltage | 2.75V | Normal discharge protection point |
| 14 | Discharge Termination Voltage | 2.85V | Low voltage alarm threshold |
| 15 | Operating Temperature | Charging: 5°C ~ 45°C
|
Wide temperature working range |
Product Features
- Original EVE 21700 50E high energy density cell, 4800mAh stable actual capacity, long cycle life
- Integrated customized BMS protection board with gold-plated contact pads for stable signal transmission
- Nickel tab spot welding structure, low connection resistance, strong shock resistance
- Multi-layer safety protection: overcharge, over-discharge, over-current, short circuit and temperature protection
- Support up to 2A fast charging and 6A high-current continuous discharge, strong power output
- Two optional appearances: bare cell with BMS board / fully enclosed black plastic casing for easy assembly
- Wide operating temperature range, stable performance for indoor & outdoor portable equipment
- CE certified, safe and compliant for global market sales
Wide Application Scenarios
- Cordless power tools: electric screwdrivers, mini drills, trimming machines
- Portable electronic devices: handheld lighting, mini fans, portable speakers
- Small outdoor power equipment: camping lights, portable measuring instruments
- Medical handheld devices, small beauty equipment, DIY energy storage modules
Packing & Supply Info
- Supply Type: Factory direct supplier, support OEM & ODM custom casing, BMS circuit modification
- Certifications: CE, 3C, UN38.3 transportation safety certification
- Delivery: Standard shipment voltage ≥3.85V, safe air & sea transport available
- MOQ: Small batch trial order acceptable, bulk order with competitive factory price
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