1. Introduction
This manual provides essential information for the safe and effective use of your NOHON replacement battery. NOHON batteries are designed to restore your mobile phone's power with high-density, 0-cycle cells and advanced safety features. Please read this manual thoroughly before installation and use.

2. Safety Information and Warnings
RISK WARNING!

- This product is a built-in battery. Replacing it requires disassembling the mobile phone, which is a risky procedure. It is strongly recommended that this operation be performed by professionals.
- If you choose to replace the battery yourself, NOHON provides installation tools and disassembly tutorials for corresponding models. However, NOHON cannot provide warranty coverage if the mobile phone or battery is damaged during the disassembly process. Any corresponding losses are borne by the customer.
- Do not disassemble, puncture, crush, heat, or incinerate the battery.
- Avoid contact with water or other liquids.
- Keep out of reach of children.
2.1. 10 Security Protections
NOHON batteries are equipped with multiple protection mechanisms to ensure safety and reliability:

- Overpower Protection
- Overvoltage Protection
- Lightning Protection
- Overcurrent Protection
- Anti-interference Protection
- Undervoltage Protection
- Static Electricity Protection
- Short Circuit Protection
- Temperature Protection
- Flame Retardant Materials
Additional security features include a double memory metal fuse for automatic short-circuit repair and intelligent temperature control to prevent overheating during charging.
3. Package Contents
Your NOHON replacement battery package typically includes:
- 1 x NOHON Replacement Battery
- 1 x Set of Free Disassembly Tools (Note: Actual tools may vary in appearance and color due to different batches. They are provided for reference only.)

4. Specifications
| Feature | Description |
|---|---|
| Brand Name | Nohon |
| Compatible Brand | Xiaomi |
| Model Number | BP53 (and various other models, see compatible list) |
| Original or Not | Compatible |
| Quality Certification | CE, ROHS, UL, FCC, MSDS |
| Battery Capacity (mAh) | Varies by model (e.g., BP53: 5380mAh, BP40: 3900-4000mAh) |
| Origin | Mainland China |
| High-concerned chemical | None |
| Package Weight | 0.2 kg |
| Package Dimensions | 21 x 15 x 3 cm |
4.1. Compatible Models and Battery Codes
- BM53: For Redmi K30S Ultra
- BM4U: For Redmi K30 Ultra
- BP40: For Redmi K20 Pro / Mi 9T Pro
- BP41: For Redmi K20 / Mi 9T
- BP49: For Redmi K40S
- BM56: For Redmi K40 Gaming
- BM4Q: For Redmi K30 Pro
- BM4P: For Redmi K30 / K30i
- BM5E: For Redmi K50 Pro
- BP48: For Redmi K50 Gaming
- BM4Y: For Redmi K40 / K40Pro
- BM5J: For Redmi K50 Ultra
- BM5L: For Redmi K60 Pro
- BM5M: For Redmi K60
- BM5F: For Redmi K50 / K60E
- BM5S: For Redmi K60 Ultra
- BM5W: For Redmi K70 / K70Pro
- BP53: For Redmi K70 Ultra
5. Installation and Setup
Replacing a built-in phone battery requires technical skill and specialized tools. It is highly recommended to seek professional assistance for installation to avoid damaging your device or the new battery.
If you proceed with DIY installation, please follow these general steps:
- Preparation: Ensure your phone is powered off. Gather the provided disassembly tools.
- Disassembly: Carefully open your phone according to a specific guide for your phone model. This usually involves heating the back cover, using suction cups, and prying tools.
- Disconnect Old Battery: Locate the old battery connector and gently disconnect it from the motherboard.
- Remove Old Battery: Carefully remove the old battery. It might be secured with adhesive.
- Install New Battery: Place the NOHON replacement battery into the battery compartment. Ensure it sits correctly.
- Connect New Battery: Connect the new battery's flex cable to the motherboard.
- Reassembly: Carefully reassemble your phone, ensuring all components are properly seated and connected.
- Initial Charge: After reassembly, fully charge the new battery before its first use.
Remember: Any damage to the phone or battery during DIY installation may void the warranty.
5.1. Manufacturing Process Overview
The NOHON battery manufacturing process involves advanced techniques to ensure quality and performance:
Video: NOHON Lithium Polymer Battery Manufacturing Process
- Battery Interior Manufacturing: Automatic CNC machines process positive and negative raw materials. Multiple rolling compressions improve energy density and storage efficiency. Highly safe nano-materials create insulation diaphragms. Accurate slitting and compaction ensure balanced cell capacity and performance.
- Protection Board Installation: High-precision PCM protection boards are manufactured using SMT reflow process. These boards are equipped with functions such as overcharge, overdischarge, and overheating protection. Laser welding ensures stable and reliable connections between the protection plate and electrodes.
6. Operating Instructions
To maximize the lifespan and performance of your NOHON battery:
- First Use: Fully charge the battery before its initial use.
- Charging: Use a certified charger compatible with your phone model. Avoid using damaged or uncertified chargers.
- Temperature: Operate and charge the battery within recommended temperature ranges (typically 0°C to 45°C). Extreme temperatures can degrade battery performance and lifespan.
- Avoid Deep Discharge: Do not let the battery completely drain to 0% frequently. Charge it before it gets too low.
- Avoid Overcharging: While NOHON batteries have overcharge protection, it's good practice to disconnect the charger once the battery is full.

7. Maintenance
- Regular Charging: Charge your phone regularly to maintain battery health.
- Storage: If storing the battery for an extended period, charge it to about 50-60% and store it in a cool, dry place. Recharge it every few months to prevent deep discharge.
- Cleaning: Keep the battery and phone's charging port clean and free of debris.
- Physical Damage: Avoid dropping or subjecting the phone to physical shocks, which can damage the internal battery structure.
8. Troubleshooting
If you experience issues with your NOHON battery, consider the following:
- Battery Not Charging: Ensure the charger and cable are working correctly. Check the charging port for debris. If the issue persists, professional inspection may be needed.
- Rapid Battery Drain: Check for background apps consuming power. Calibrate the battery by fully discharging and then fully charging it. If the problem continues, the battery might be faulty or the phone has other power consumption issues.
- Phone Not Turning On: Ensure the battery is properly connected and has sufficient charge. Try a different charger. If still unresponsive, consult a professional.
- Overheating: If the phone or battery overheats significantly during charging or use, immediately disconnect the charger and power off the device. Overheating can indicate a serious issue and requires professional attention.
9. User Tips
- Battery Calibration: Some users find that after replacing the battery, performing a full discharge (until the phone turns off) followed by a full charge (to 100% without interruption) can help the phone's software accurately read the new battery's capacity.
- Monitor Battery Health: Utilize your phone's built-in battery health monitoring features (if available) to track the performance of your new NOHON battery.
- Software Updates: Keep your phone's operating system updated, as software optimizations can improve battery efficiency.
10. Warranty and Support
NOHON is committed to providing high-quality products and support.
- Free Returns: Enjoy free returns within 90 days of purchase.
- Certified Original: NOHON batteries are certified original, ensuring quality and authenticity.
- Security & Privacy: NOHON ensures safe payment processes and protects your personal details.
For further assistance or warranty claims, please contact NOHON customer support through the platform where you purchased the product.

