Power li-ion battery 402050 3.7V 400mAh 1.48wh Rechargeable Lipo Battery Cells
Specifications
| Parameter |
Specification |
| Battery Type |
3.7V 400mAh Li-polymer |
| Charge Voltage |
4.2V |
| Nominal Voltage |
3.7V |
| Nominal Capacity |
400mAh (0.2C Discharge) |
| Charge Current |
Standard: 0.5C (200mA)
Rapid: 1.0C (400mA) |
| Charging Method |
0.5C CC to 4.2V, then CV until current ≤0.05C |
| Charging Time |
Standard: ~2.75 hours
Rapid: ~2 hours |
| Max Charge Current |
0.5C (200mA) |
| Max Discharge Current |
1.0C (400mA) |
| Discharge Cut-off Voltage |
2.55V ±0.25V (0.2C) |
| Operating Temperature |
Charging: 0°C to 45°C
Discharging: 0°C to 45°C
Storage: -10°C to 45°C |
| Dimensions |
Length: 50±2mm
Width: 20±0.5mm
Thickness: 4±0.2mm |
| Cycle Life |
≥500 cycles |
Advantages：
1. High energy density and long battery life
2. Superior safety performance
Polymer electrolyte: Uses solid/gel electrolyte instead of liquid electrolyte, reducing leakage risk. Even if damaged, it will not explode, only bulge slightly.
Multiple protections: Built-in protection board (BMS) prevents overcharging (>4.2V), over-discharging (<2.5V), overcurrent, and short circuits, significantly improving safety.
High temperature resistance: Ternary material has good thermal stability and a wide operating temperature range (-20℃~60℃). Performance degradation is slow in high-temperature environments.
3. Excellent charge and discharge performance
Low internal resistance: Internal resistance < 100mΩ, high discharge efficiency, small voltage drop during high-current discharge, and high instantaneous output power.
No memory effect: Can be charged without complete discharge, making it more convenient to use and extending its actual service life.
Low temperature adaptability: Maintains more than 70% capacity even at -20℃, suitable for use in cold regions.
4. Environmentally friendly and long lifespan characteristics
Long cycle life: 300-500 charge and discharge cycles, can reach 2-300 cycles under normal use. Reduced replacement frequency and cost per year
Low self-discharge: Monthly self-discharge rate < 5%, retains over 90% charge after 3 months of storage, suitable for long-term backup devices
Free of heavy metals: Contains no cadmium, mercury, or other harmful substances, complies with RoHS standards, and has minimal environmental pollution
Application：
1. Consumer Electronic Devices
Tablet PCs/E-readers:
Laptops:
Smartphones:
Digital Products
2. Mobile Office and Business Equipment
Portable Printers:
POS Machines:
Power Banks:
3. Professional and Industrial Equipment
Medical Equipment: Monitors, portable diagnostic equipment, hearing aids, etc.
Security Monitoring: Wireless cameras, GPS locators
Industrial Testing Equipment: Portable measuring instruments, data acquisition devices
