1. Introduction
This manual provides essential information for the safe and effective use of your EEMB LP653042-PCM Lithium Polymer Battery. Please read all instructions carefully before use to ensure optimal performance and safety.
2. Safety Information and Warnings
Failure to follow these safety instructions may result in fire, personal injury, or property damage.
- Polarity Check: Before connecting, confirm that the device's polarity matches the battery pack connector. Incorrect polarity will cause a short circuit and product failure. The red wire is the positive electrode (+), and the black wire is the negative electrode (-).
- Do not short-circuit, disassemble, deform, or heat the battery.
- Do not place the battery near direct flame.
- Strictly prohibit piercing the cell with a sharp object such as a needle.
- Keep the cells in a 40%-60% charged state during long-period storage.
- We recommend charging the battery every 3 months after receipt and maintaining a voltage of 3.7-4.0V.
- Store the battery in a cool and dry place.
- This battery includes a PCM (Protection Circuit Module) for overcharge, over-discharge, overcurrent, and short circuit protection.


3. Product Specifications
The EEMB LP653042-PCM Lithium Polymer Battery offers reliable performance for various applications.

| Feature | Value |
|---|---|
| Model Number | LP653042-PCM |
| Nominal Voltage | 3.7V |
| Typical Capacity | 820mAh |
| Minimum Capacity | 770mAh |
| Weight | Approximate 16.4g |
| Dimensions (W x L x H) | 30.5 x 44 x 6.8mm (1.2" x 1.69" x 0.26") |
| Maximum Charge Current | 770mA |
| Limited Charge Voltage | 4.200 ± 0.020 V |
| Cut-off Discharge Voltage | 2.750 ± 0.005 V |
| Overcharge Detection Voltage | 4.28 ± 0.05V |
| Overdischarge Detection Voltage | 3.0 ± 0.1V |
| Protection Function | Overcharge, Over-discharge, Overcurrent, Short Circuit |
| Certifications | UN 38.3 Compliant |
4. Setup and Installation
Before installing the battery, ensure your device is powered off and disconnected from any power sources. Carefully follow these steps:
- Verify Compatibility: Confirm the battery size, connector model, connector size, and connector polarity match your device's requirements. This battery features a JST-PHR-02 connector.
- Check Polarity: The battery's red wire is positive (+), and the black wire is negative (-). Ensure your device's positive terminal connects to the battery's positive terminal, and the device's negative terminal connects to the battery's negative terminal. Incorrect connection can cause damage.
- Connect Battery: Carefully plug the battery's JST connector into the corresponding port on your device. Ensure a secure fit.
- Secure Battery: Place the battery securely within your device, ensuring it does not move freely or come into contact with sharp objects or conductive materials.

5. Operating Instructions
Once installed, the battery powers your device. The integrated PCM provides protection during operation.
- Initial Charge: For optimal performance, fully charge the battery before its first use.
- Charging: Use a compatible charger designed for 3.7V Lithium Polymer batteries. Do not exceed the maximum charge current of 770mA or the limited charge voltage of 4.200 ± 0.020 V.
- Discharging: The battery is designed to operate until it reaches its cut-off discharge voltage of 2.750 ± 0.005 V, at which point the protection circuit will activate to prevent over-discharge.
- Applications: This battery is suitable for various devices including Bluetooth speakers, dash cams, keyboards and mice, Wi-Fi enabled smart home systems, PDAs, digital cameras, GPS, monitoring units, e-books, tracking devices, sleep management equipment, blood oxygen tracking equipment, and pulse monitors.

6. Maintenance and Storage
Proper maintenance and storage extend the battery's lifespan and ensure safety.
- Regular Charging: If storing for an extended period, charge the battery to 40%-60% capacity (approximately 3.7-4.0V) every 3 months.
- Storage Conditions: Store the battery in a cool, dry place, away from direct sunlight, heat sources, and flammable materials.
- Avoid Physical Damage: Do not drop, crush, or expose the battery to excessive impact.
- Cleaning: If necessary, gently wipe the battery surface with a dry, soft cloth. Do not use liquids or abrasive cleaners.
7. Troubleshooting
If you encounter issues with your EEMB battery, consider the following:
- Battery Not Charging: Ensure the charger is compatible and functioning correctly. Check all connections for proper seating and polarity.
- Device Not Powering On: Verify the battery is fully charged and correctly installed with the correct polarity. Check if the device itself has any issues.
- Shortened Run Time: This may indicate battery aging. Ensure proper charging and storage practices are followed. If the issue persists, the battery may need replacement.
- Overheating: If the battery becomes excessively hot during charging or use, immediately disconnect it and cease operation. Contact customer support if overheating persists.
For further assistance, please refer to the support section.
8. Manufacturing Process and Quality Assurance
EEMB batteries are manufactured using advanced processes and undergo rigorous quality control to ensure reliability and safety.


9. Warranty and Support
EEMB is committed to providing quality products. For any questions or concerns regarding your battery, please contact EEMB customer service through the platform where you purchased the product.
EEMB has been a professional battery manufacturer and solution provider since 1995, covering a wide range of lithium battery chemistries.