Introduction
3.7 V 320mah Lithium Polymer Battery features high energy density and a protective PCM. It resolves insufficient runtime and voltage instability, ensuring consistent power and long-term reliability for compact electronic devices and smart hardware.
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Items |
Specifications |
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Batteries |
3.7v 320mah lipo battery |
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Charge voltage |
4.2V |
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Nominal voltage |
3.7V |
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Typical Capacity |
Typical Capacity: 320mAh; Minimum Capacity: 280mAh |
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Charge current |
Standard Charging: 0.5C Rapid charge: 1.0C |
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Standard Charging method |
0.5C CC (constant current) charge to 4.2V, then CV (constant voltage 4.2V) charge till charge current decline to ≤0.05C |
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Charging time |
Standard Charging: 2.75hours(Ref.) Rapid charge: 2hours(Ref.) |
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Max.charge current |
1.0C |
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Max.discharge current |
1.0C |
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Discharge cut-off voltage |
2.75V(0.2C) |
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Operating temperature |
0 °C ~45 °C |
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Discharging temperature |
-10°C~ +45 °C |
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Dimension |
Length: 50±2mm (not including tabs) Width: 20±0.5mm Thickness:10±0.2mm |
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Drop Test |
The cell is to be dropped from a height of 1.0 meter twice onto concrete ground. No fire, no leakage |
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Cycle time |
≥300times |
Key Features
Verified Real 320mAh Capacity
Each cell is tested through charge-discharge and capacity grading processes to ensure true 320mAh output and eliminate capacity deviation in mass production.
Ultra-Low Self-Discharge
High-purity chemical composition ensures the battery retains over 85% charge even after 6 months of storage.
Compact High-Energy Design
Provides higher energy density compared to standard 300mAh cells within the same physical dimensions, supporting longer device runtime without redesigning housing structure.
Built-in Protection System
Integrated PCM protection board provides overcharge, over-discharge, and short-circuit protection, improving operational safety in end-use devices.
Customization & OEM Services
Shape & Size: Adjustable thickness (T), width (W), and length (L) to match your mold.
Wiring & Connectors: Selection of JST, Molex, or PHR terminals with custom lead lengths.
Thermal Protection: Optional 10K/100K NTC thermistors for real-time temperature monitoring.
High-Rate Discharge: Specialized cells available for devices requiring 3C, 5C, or higher burst currents.
Applications
Audio Gear: Mid-to-high-end Bluetooth neckband headphones and portable DACs.
Smart Wearables: Fitness trackers, smart rings, and AR/VR peripheral controllers.
Smart Home: Wireless sensors, smart door locks, and Bluetooth remote controls.
Medical & Beauty: Handheld pulse oximeters, facial massagers, and electronic pens.
Manufacturing Capability
As a professional lithium polymer battery manufacturer, we operate a fully controlled production system including:
Automated cell assembly lines
Laser and ultrasonic welding systems
Capacity grading and sorting equipment
Aging test rooms for stability verification
Final inspection and packaging lines
With large-scale production capacity, we support stable supply for OEM and wholesale orders with consistent quality output.
FAQ
Q: Can this 320mAh battery replace my current 300mAh model?
A: In most cases, yes. It offers longer runtime. However, please verify that the physical dimensions (Thickness/Width/Length) fit your existing battery compartment.
Q: What is the typical shelf life?
A: Due to our low self-discharge chemistry, the battery retains most of its charge for 6-12 months, though we recommend a maintenance charge every 3-6 months for long-term storage.
Q: Do you provide samples for testing?
A: Yes, we provide engineering samples for performance verification and fitment testing prior to mass production.
How do you arrange shipment?
We ship via DHL, FedEx, UPS, TNT, or your nominated freight forwarder. For every shipment, we provide packing photos and tracking details to ensure full visibility during delivery.
Q: How is the battery packaged?
A: The battery is packed using flexible aluminum-plastic pouch material, designed to provide strong protection against moisture, pressure, and physical damage during transportation and storage.
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