BN54 Li-ion Polymer Battery for Xiaomi Redmi 10X 4G / Redmi Note 9

Is your Xiaomi Redmi 10X 4G or Redmi Note 9 no longer holding a charge like it used to? Does your phone shut down unexpectedly even when the battery indicator shows power remaining, or do you find yourself reaching for the charger more and more frequently throughout the day? This BN54 Li-ion Polymer Battery 5020mAh is the exact high-performance replacement component you need to restore all-day battery life and reliable power delivery to your device . Available now at THE REPAIR PLUS, your trusted UK-based online store for quality phone repair parts.

Compatibility

This BN54 replacement battery is designed for the Xiaomi Redmi 10X 4G and Redmi Note 9 series. It is compatible with the following models :

For Redmi Note 9:

• M2003J15SC

• M2003J15SG

• M2003J15SS

For Redmi 10X 4G:

• Compatible with Redmi 10X 4G models

For Redmi 9:

• M2004J19AG

• M2004J19C

• M2004J19G

The battery carries model number BN54 and is a direct replacement for the original battery in these devices . Please verify your device model number in Settings → About Phone before purchasing to ensure correct fitment. THE REPAIR PLUS recommends double-checking your device compatibility to guarantee a perfect match.

Signs You Need This Replacement

• The time between charges is getting shorter and shorter, requiring multiple charges daily 

• Your Redmi phone shuts down unexpectedly at a certain battery percentage (often 15-30%)

• The charging process completes surprisingly quickly, but the battery drains just as fast

• The battery is swollen or bulging, potentially pushing the screen or back cover apart—if swollen, handle with extreme caution 

• You're experiencing overheating issues during charging or normal use

• The phone takes an unusually long time to charge, or the charging percentage jumps erratically

• Your device powers off immediately when unplugged, even showing a high percentage

Premium Quality Specifications

This high-quality replacement battery meets or exceeds the original specifications and includes the following features :

• Capacity: 5000-5020mAh (4920mAh rated capacity) 

• Battery Type: Premium Lithium-Ion Polymer (Li-Po) / Lithium-Ion (Li-ion) 

• Model Number: BN54 compatible

• Voltage: 3.8V - 3.87V 

• Energy Capacity: Approximately 19.43 Wh 

• Application: Mobile phone

• Condition: Brand New with zero operating cycles

• Safety Features: Built-in intelligent IC chip technology with protection against overcharging, overheating, overvoltage, and short circuits 

• Certifications: Meets quality standards including CE, FCC, RoHs 

Quality Grades Available

Some suppliers offer different quality grades for BN54 batteries:

• High Copy / Grade AAAA: High-quality copies that are slightly inferior to original but offer excellent performance and value 

• DEJI Brand: Premium aftermarket brand with 12-month warranty, fresh production date, and certified safety standards 

• OEM Compatible: Original equipment manufacturer compatible batteries with 100% testing before shipment 

What This Replacement Restores

• Original 5000mAh Battery Life: Restores the all-day performance your device had when new, providing extended usage for gaming, video streaming, and daily smartphone use 

• Reliable Power Delivery: Eliminates unexpected shutdowns and erratic battery behaviour

• Free from Memory Effect: Holds the charger longer and handles multiple charge and discharge cycles effectively

• Safe Operation: Premium quality batteries feature built-in protection against overcharging, overheating, and short circuits to ensure long-term use 

• Device Integrity: Replacing a swollen battery prevents further damage to other internal components

• Sustainable Solution: Extend the life of your current device instead of contributing to electronic waste

Premium Quality Assurance

This is a premium quality replacement battery manufactured to meet or exceed original specifications. High-quality replacement batteries are engineered to match the exact specifications of the Xiaomi Redmi Note 9 and Redmi 10X 4G, ensuring seamless integration and optimal functionality for your device .

The benefits of choosing a quality replacement battery from THE REPAIR PLUS include:

• Assurance that the battery will have the stated 5000mAh capacity 

• Assurance that the battery will have low self-discharge rates and will hold its charge even when not in use

• Assurance that the power unit will work seamlessly with your Xiaomi device

• Assurance that the manufacturing process has respected all safety guidelines for Lithium-Ion batteries

Each unit undergoes rigorous quality control with built-in safety protection against overcharging, overheating, and short circuits. Premium aftermarket brands like DEJI implement quality control (QC) at every stage of battery manufacturing . All parts stocked at THE REPAIR PLUS undergo thorough quality checks before being made available to customers.

Why Choose THE REPAIR PLUS?

• UK-Based Online Store: Fast shipping across the United Kingdom with reliable delivery

• Quality Tested Parts: Each battery is sourced from trusted suppliers and verified for quality

• Expert Support: Questions about compatibility? THE REPAIR PLUS team is here to help

• Trusted Supplier: Join countless UK customers who trust THE REPAIR PLUS for their phone repair needs

• Eco-Friendly Choice: Repairing your device instead of replacing it protects natural resources and prevents electronic waste

• Extended Battery Life: Quality replacement batteries offer increased battery life compared to worn-out originals 

Important Battery Information

First-Time Use and Conditioning:

New Lithium-Ion batteries require proper conditioning to achieve optimal performance:

• New Lithium Ion batteries must be FULLY CHARGED and FULLY DISCHARGED 2 to 3 times before being FULLY CONDITIONED

• It is recommended to perform at least 5-6 cycles of full charge-discharge for the device to correctly display the charge percentage 

• Please remember that a new Lithium-Ion battery's full performance and longevity is only achieved after 2 to 3 complete charge and discharge cycles

• The battery will only reach its optimal use after 3 to 5 full charge/discharge cycles

• After you go through 2 to 3 cycles, you'll never have to condition your battery again!

Proper Charging Habits:

• Use the original charger that came with your device for best performance

• To prolong battery lifespan, charge when the level drops to 20-30% rather than letting it drain completely to 0%

• Avoid overcharging – unplug once fully charged

Storage Guidelines:

• If you are not using the battery for a long time, put it in a dry and cool place

• Store at approximately 25-50% charge in a cool, dry place

• Capacity loss is minimal under proper storage conditions

Swollen Battery Warning:

If your old battery is swollen, handle with extreme caution. Do not puncture, crush, or apply heat—this can cause fire or explosion. A battery that heats up excessively during charging or is swollen needs to be replaced . Properly dispose of swollen batteries at authorised recycling centres.

Warranty Information:

• Premium replacement batteries like DEJI come with up to 12 months warranty 

• Warranty covers manufacturing defects only

• Physical damage, swollen, and burnt batteries are typically not covered under warranty

Proper Disposal:

Never throw lithium-ion batteries in household trash. Always recycle through authorised electronic waste recycling centres. Tape over the terminals before disposal to prevent short circuits.

Installation Information

⚠️ This is an intermediate-level repair requiring careful attention.

The Xiaomi Redmi Note 9 and Redmi 10X 4G feature non-removable battery designs, which means proper tools and techniques are necessary for safe removal of the old battery.

Complete Toolkit Included (with select listings):

Some premium BN54 battery packages include a complete set of tools for DIY installation :

• Replacement battery (BN54 5020mAh)

• Set of repair tools (screwdrivers, opening picks, spudgers)

• Instruction manual for self-replacement

• Branded packaging

Important Safety Precautions:

• Professional installation by a qualified technician is strongly recommended if you lack experience

• Never use metal tools near the battery – they can puncture it and cause fire or explosion

• Check if there is any dust in the connector or if any pin is broken before installation

• Check for any corrosion in contacts and plugs; clean using isopropyl alcohol or swabs if necessary 

• Use ESD (electrostatic discharge) protection

• If the battery is swollen, handle with extreme care and avoid applying pressure

• Once installed, the battery cannot be returned

Learning Resources:

• Most batteries come without instructions – you can read tutorial videos on YouTube and install it yourself or have a technician help you 

• Perfect for DIY users and repair professionals alike

Customer Support:

If you encounter any problems after inserting the battery, contact us immediately. We will get back to you within 24 hours.

THE REPAIR PLUS strongly recommends having this component installed by a qualified technician with experience in smartphone repairs. We are not responsible for any damage caused during installation.

Package Includes

1 x BN54 Li-ion Polymer Battery for Xiaomi Redmi 10X 4G / Redmi Note 9 (5020mAh)

Order with Confidence

When you order from THE REPAIR PLUS, you are choosing quality parts and reliable service from a UK-based seller. We take pride in helping you keep your devices running like new. Fast shipping across the UK means you get your parts quickly and can restore your Xiaomi device's legendary battery life with minimal downtime.