1. Product Overview
This manual provides essential information for the safe and effective use of your 402020 3.7V 120mAh Lithium Polymer Battery. This battery is designed for a wide range of portable electronic devices requiring a compact and reliable power source.
2. Setup and Installation
The 402020 Li-Polymer battery typically comes with a PH-2.0p plug for connection. Ensure your device is compatible with this connector type and voltage.
2.1 Connector Type
By default, batteries are shipped with a PH-2.0p plug. For custom plug requirements, a minimum order quantity of 20 pieces is typically required, with approximately 7 working days for delivery.
2.2 Wiring and Polarity
The battery features red and black wires. The red wire indicates the positive (+) terminal, and the black wire indicates the negative (-) terminal. Always ensure correct polarity when connecting the battery to your device.
Important Note on Assembly: The positive and negative lugs of the battery, whether in front assembly or reverse assembly, are delivered randomly. This orientation does not affect the functionality or use of the product.
3. Operating Instructions
This Li-Polymer battery is designed for reliable performance in various applications.
3.1 Charging
- Charging Voltage: 4.2V
- Maximum Charging Current: 1.2A
Use a compatible charger designed for 3.7V Li-Polymer batteries with a charging voltage of 4.2V. Overcharging can damage the battery and pose safety risks.
3.2 Discharging
- Rated Voltage: 3.7V
- Discharge Voltage: 2.75V (minimum)
- Operating Current: 0.15A - 1.25A
- Maximum Discharge Current: 1.2A
Avoid discharging the battery below its minimum discharge voltage of 2.75V to prolong its lifespan. The battery is equipped with protection functions to prevent over-discharge.
3.3 Applications
The 402020 battery is suitable for a wide range of small electronic devices, including but not limited to:
- Bluetooth Headsets
- Medical Equipment
- Portable DVD Players
- Camping Lights
- LED Lights
- Beauty Equipment
- Smart Products
- Small Fans
- Flashlights
- Cordless Phones
- Walkie Talkies
- Wireless Mouse and Keyboards
- PDAs
- Electric Toys
- Plug-In Speakers
4. Maintenance and Storage
4.1 General Care
- Avoid exposing the battery to extreme temperatures (below -20°C or above 60°C).
- Do not puncture, disassemble, or short-circuit the battery.
- Keep the battery away from water and moisture.
- Ensure the battery is charged periodically if stored for long durations to prevent deep discharge.
4.2 Storage
- Storage Temperature: -10°C to 45°C
- Store the battery in a cool, dry place, ideally at around 50% charge.
- Avoid storing the battery fully charged or fully discharged for extended periods.
4.3 Lifespan
The battery has a cycle life of approximately 300 times, maintaining 80% or more of its original capacity. The shelf life is typically 1 year under proper storage conditions.
4.4 Safety Features
The battery is equipped with internal protection functions against:
- Overcharge
- Overdischarge
- Overcurrent
- Short circuit
5. Troubleshooting
5.1 Battery Not Responding
If the device does not power on or respond after connecting the battery:
- Check Polarity: Ensure the red wire is connected to the positive terminal and the black wire to the negative terminal of your device. If unsure or if the device still doesn't respond, try carefully swapping the red and black wires of the battery plug.
- Secure Connection: Verify that the PH-2.0p plug is securely seated in the device's port.
- Battery Charge: Confirm the battery has sufficient charge. Try charging the battery for a period.
5.2 Reduced Performance
If the battery's runtime or performance seems reduced:
- Check Age: Batteries naturally degrade over time and with charge cycles. Consider the battery's age and cycle count.
- Charging Habits: Ensure you are using a compatible charger and avoiding frequent deep discharges or overcharges.
- Environmental Factors: Extreme temperatures can affect battery performance. Operate the device within recommended temperature ranges.
6. Specifications
| Feature | Specification |
|---|---|
| Model Number | 402020 (also referred to as 042020) |
| Battery Type | Li-Polymer (Lithium Polymer) |
| Nominal Capacity | 120mAh |
| Nominal Voltage | 3.7V |
| Charging Voltage | 4.2V |
| Discharge Voltage | 2.75V (minimum) |
| Operating Current | 0.15A - 1.25A |
| Maximum Charging Current | 1.2A |
| Maximum Discharge Current | 1.2A |
| Dimensions (H x W x L) | 4mm x 20mm x 20mm |
| Operating Temperature | -20°C to 60°C |
| Storage Temperature | -10°C to 45°C |
| Cycle Life | 300 cycles (≥80% capacity retention) |
| Shelf Life | 1 year |
| Protection Function | Overcharge, Overdischarge, Overcurrent, Short Circuit |
| Certification | CE |
| Origin | Mainland China |
7. Warranty and Support
7.1 Product Longevity
This battery is designed for a shelf life of 1 year and a cycle life of 300 charges while retaining at least 80% of its capacity. Proper usage and storage as outlined in this manual will help maximize its lifespan.
7.2 Technical Support
For any technical inquiries or issues not covered in this manual, please contact the seller's customer service. Provide your product model number and a detailed description of the issue for efficient assistance.
8. User Tips
- Verify Compatibility: Always double-check the voltage, capacity, and connector type requirements of your device before purchasing and installing a replacement battery.
- Initial Charge: It is often recommended to fully charge a new battery before its first use to calibrate its charge indicator.
- Temperature Awareness: Avoid leaving devices powered by this battery in direct sunlight or extremely cold environments, as this can negatively impact battery life and performance.
- Safe Disposal: Do not dispose of old batteries in household waste. Always follow local regulations for battery recycling to prevent environmental harm.
