BN49 for Xiaomi Redmi 7A Li-ion Polymer Battery

Is your Xiaomi Redmi 7A 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 BN49 Li-ion Polymer Battery 4000mAh is the exact high-performance replacement component you need to restore reliable power delivery and extend the life of your device. Available now at THE REPAIR PLUS, your trusted UK-based online store for quality phone repair parts.

Compatibility

This BN49 replacement battery is designed specifically for the Xiaomi Redmi 7A. It is compatible with the following model numbers :

• MZB7995IN

• M1903C3EG

• M1903C3EH

• M1903C3EI

The battery carries model number BN49 and is an original/compatible replacement for the Redmi 7A . Please verify your device model number in Settings → About Phone and check that your original battery model is BN49 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 7A 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: 4000mAh / 15.4Wh 

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

• Model Number: BN49

• Voltage: 3.8V - 3.85V 

• Compatible Brand: Xiaomi / Redmi 

• Condition: Brand New with zero operating cycles

• Safety Features: Built-in protection circuit against overcharging, over-discharging, overcurrent, and short circuits

• Certification: Undergoes exhausting testing and certification process for safety and reliability 

What This Replacement Restores

• Original 4000mAh Battery Life: Restores the all-day performance your device had when new, providing reliable power for browsing the web, watching videos, and staying connected throughout the day 

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

• 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 aftermarket batteries are manufactured to meet or even exceed original equipment specifications, and they undergo an exhausting testing and certification process to ensure they are safe, reliable, and offer long battery life .

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

• Assurance that the battery will have the stated 4000mAh 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 Redmi 7A

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

An original Xiaomi BN49 battery is available as a service pack, which means it is designed for easy installation and ensures optimal performance, meeting Xiaomi's high standards for quality and contributing to an improved lifespan of your device .

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

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

• 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

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

• Charge battery for 3 hours before using 

• Use only original charger to charge the battery 

Proper Charging Habits:

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

• Avoid overcharging – unplug once fully charged

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

Storage Guidelines:

• Store in a cool, dry place

• If storing for extended periods, maintain approximately 25-50% charge

• Capacity loss is minimal (about 2% per year) 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. Properly dispose of swollen batteries at authorised recycling centres.

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 7A features a non-removable battery design, which means proper tools and techniques are necessary for safe removal of the old battery.

Tools Required :

• Phillips #00 screwdriver

• Plastic opening tool

• New BN49 battery

Step-by-Step Installation Guide :

1. Power off your device: Turn off your Xiaomi Redmi 7A completely before beginning the replacement process

2. Remove the back cover: Use the plastic opening tool to gently pry off the back cover. Be careful not to damage the screen or any internal components

3. Remove the screws: Use the Phillips #00 screwdriver to remove the four screws securing the battery to the device

4. Disconnect the battery connector: Gently lift the battery connector from its socket

5. Remove the old battery: Carefully slide the old battery out of the device

6. Install the new battery: Align the new BN49 battery with the connector socket and gently press it into place

7. Secure the battery: Replace the screws and secure the battery to the device

8. Reattach the back cover: Snap the back cover back onto your device

9. Power on your device: Turn on your Xiaomi Redmi 7A and enjoy the improved battery life

Troubleshooting Common Issues :

• Battery not charging: Make sure the battery connector is securely connected to the device. If the issue persists, try using a different charger or cable

• Device not turning on: Check if the battery is properly installed and the screws are securely tightened. If the issue persists, contact our Customer Service team for further assistance

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

• Disconnect the battery before attempting any other repairs

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

• 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

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 BN49 Li-ion Polymer Battery 4000mAh for Xiaomi Redmi 7A

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 Redmi 7A's battery life with minimal downtime.