Power Batteries 702030 3.7V 400mAh Rechargeable Polymer Lithium Battery
High-performance rechargeable polymer lithium battery cells designed specifically for wireless headphones and other compact electronic devices.
Technical Specifications
| Parameter |
Specification |
| Battery Type |
3.7V 400mAh LiPo Battery |
| Charge Voltage |
4.2V |
| Nominal Voltage |
3.7V |
| Nominal Capacity |
400mAh @ 0.2C Discharge |
| Charge Current |
Standard: 0.2C, Rapid: 1.0C |
| Standard Charging Method |
0.5C CC charge to 4.2V, then CV charge at 4.2V till current declines to ≤0.05C |
| Charging Time |
Standard: 2.75 hours, Rapid: 2 hours |
| Max Charge Current |
0.5C |
| Max Discharge Current |
1.0C |
| Discharge Cut-off Voltage |
2.5V±0.25V (0.2C) |
| Operating Temperature |
Charging: 0°C ~45°C, Discharging: 0°C ~45°C |
| Storage Temperature |
-10°C ~ +45°C |
| Dimensions |
Length: 30±0.5mm, Width: 20±0.5mm, Thickness: 7±0.2mm |
| Drop Test |
Dropped from 1 meter twice onto concrete with no fire or leakage |
| Cycle Life |
≥800 cycles |
Key Features
- Voltage & Capacity: 3.7V nominal voltage with 400mAh capacity for low-power electronic devices
- Compact Design: Cell size 7.0*20.0*30.5mm, lightweight and easy to integrate into compact devices
- Efficient Charging: Charge cut-off voltage 4.2V, standard charging current 0.5C (200mA)
- High Performance: High energy density, low internal resistance, cycle life greater than 300 cycles
- Wide Temperature Range: Operating temperature range: charging 0~45℃, discharging -20~60℃
- Safety Certified: Polymer electrolyte with explosion-proof design certification
Primary Applications
Consumer Electronics
Bluetooth headsets, wireless mice, smartwatches, e-readers, digital cameras, and tablets
Smart Home & Security Equipment
Smart locks, video doorbells, wireless cameras, alarms, LED sensor lights, and nightlights
Small Power Tools & Outdoor Equipment
Electric screwdrivers, handheld fans, camping lights, and electric air pumps
Medical & Beauty Instruments
Blood glucose meters, blood pressure monitors, beauty devices, facial cleansing brushes, and personal care products
Product Images
