1. Introduction
This manual provides essential information for the safe and effective use of your new Xiaomi Mi 9 BM3L replacement battery. Please read these instructions carefully before installation and use to ensure optimal performance and safety.
2. Package Contents
Your package should contain the following items:
- 1x Original Xiaomi BM3L Battery
- (Optional, if 'Battery with tools' variant was purchased) A set of repair tools, which may include spudgers, screwdrivers, and a suction cup.
3. Specifications
| Feature | Specification |
|---|---|
| Brand | Xiaomi |
| Model Number | BM3L |
| Product Attributes | 100% Original Genuine |
| Battery Type | Lithium-ion Polymer Battery |
| Rated Capacity | 3200mAh (min) / 3300mAh (typ) |
| Rated Voltage | 3.85VDC |
| Charging Limit Voltage | 4.40VDC |
| Energy | 12.3/12.7Wh (min/typ) |
| Compatible With | Xiaomi 9, MI9, M9, MI 9 |
| Quality Certification | CE, EAC, RCM, BIS (IS 16046/IEC 62133) |
| Origin | Mainland China |
4. Important Safety Warnings
Failure to follow these safety instructions may result in fire, electric shock, injury, or damage to the battery or device.
- The battery must be fully recharged before initial use.
- Do not use inferior chargers to recharge this battery; use only Xiaomi-approved adapters to prevent damage.
- Do not disassemble or change the structure of the battery.
- Do not puncture, crush, tear, or burn the battery.
- Do not expose the battery to moisture and water.
- Do not put the battery in a high-temperature environment or in the charger for too long.
- Do not impact the battery.
- If the battery shows signs of swelling or deformation, discontinue use immediately.
- Keep the battery beyond the reach of children.
- The best storage temperature is between 20°C and 5°C.
5. Installation
Replacing a smartphone battery requires technical skill and appropriate tools. Incorrect installation can damage your device or the new battery. It is highly recommended to seek professional assistance for battery replacement if you are not confident in performing the procedure yourself.
General Installation Steps (for reference only):
- Power Off Device: Ensure your Xiaomi Mi 9 is completely powered off before beginning.
- Remove Back Cover: Carefully heat the edges of the phone's back cover to soften the adhesive, then use a suction cup and thin prying tools (spudgers) to gently separate the back cover from the frame.
- Disconnect Battery Connector: Locate the battery connector on the motherboard and carefully disconnect it using a plastic spudger to avoid short circuits.
- Remove Old Battery: The old battery is typically secured with adhesive strips. Gently pull the adhesive tabs (if present) or carefully pry the battery out using a plastic tool. Avoid bending or puncturing the old battery.
- Install New Battery: Apply new adhesive strips (if not pre-applied to the new battery) to the phone frame. Place the new BM3L battery into position, ensuring it sits flat.
- Connect Battery Connector: Carefully reconnect the new battery's flex cable to the motherboard.
- Reassemble Device: Reattach the back cover, ensuring all clips and adhesive are properly seated. Apply gentle pressure around the edges to secure it.
- Power On and Test: Power on your device and check if the new battery is recognized and charging correctly.
6. First Use and Charging
- Initial Charge: When you first receive the battery, it must be fully recharged before use.
- Conditioning Cycle: A temporary short capacity of a new battery may occur if it has not been used for a long time. This is normal. The total capacity will be reinstated after 3-5 full charge and discharge cycles.
- First Three Charges: For the first three times, use the battery until it's depleted, then charge it for approximately 5 hours. After these initial cycles, normal charging times (around 5 hours) will suffice for regular use.
7. Maintenance and Storage
- Avoid Overcharging: Do not leave the battery in the charger for excessively long periods once it's fully charged.
- Temperature: Avoid exposing the battery to extreme temperatures (very hot or very cold). The ideal storage temperature is between 20°C and 5°C.
- Cleanliness: Keep the battery and its contacts clean and dry.
- Disposal: Do not dispose of the battery in fire or water. Follow local regulations for proper battery recycling and disposal.
8. Troubleshooting
Common Issues and Solutions:
- Battery Not Charging:
- Ensure the charger and charging cable are functional and Xiaomi-approved.
- Check if the battery connector is securely attached to the motherboard.
- Restart your phone.
- Rapid Battery Drain:
- Perform the initial conditioning cycles (3-5 full charge/discharge cycles).
- Check for background apps consuming excessive power.
- Ensure your phone's software is up to date.
- Phone Not Powering On After Installation:
- Double-check all internal connections, especially the battery connector.
- Ensure the battery has some charge; try connecting the charger.
- If issues persist, professional inspection is recommended.
9. User Tips
- Verify Phone Model: Before purchasing, always confirm that your phone model is specifically Xiaomi Mi 9 (including global versions) to ensure compatibility with the BM3L battery.
- Professional Installation: If you are not experienced with phone repairs, consider having the battery installed by a qualified technician to prevent damage to your device.
10. Warranty and Support
This product typically comes with a one-year warranty from the date of purchase. Please retain your proof of purchase for warranty claims. For technical support or warranty inquiries, please contact the seller or manufacturer directly.
