Original Mi Redmi K40 Pro (M2012K11C) Battery BM4Y – 4520mAh

The Redmi K40 Pro Battery BM4Y is a high-quality 4520mAh Li-Ion Polymer replacement battery designed for the Xiaomi Redmi K40 Pro (M2012K11C). This replacement battery is suitable for restoring battery performance when your existing battery has reduced backup, drains quickly, or no longer holds a proper charge.

The Xiaomi BM4Y Battery features a 3.87V rated voltage and approximately 2 to 3 hours charging time. It is also compatible with selected Xiaomi and POCO models using the BM4Y battery specification. The battery comes in loose packing and includes a 180 Days (03 Months) replacement warranty.

Product Features

Compatible Models

The BM4Y 4520mAh Battery is compatible with the following devices:

• POCO F3 (M2012K11AG)
• Mi 11X 5G (M2012K11AI)
• Mi 11X Pro 5G (M2012K11I)
• Xiaomi Redmi K40 (M2012K11AC)
• Xiaomi Redmi K40 Pro (M2012K11C)
• Xiaomi Redmi K40 Pro+

Please check your existing battery model number and device model before ordering.

Why Replace Your Redmi K40 Pro Battery?

Over time, smartphone batteries naturally lose their ability to hold a full charge. A worn-out battery may cause:

• Fast battery drain
• Reduced battery backup
• Frequent charging requirements
• Unexpected shutdowns
• Battery percentage dropping quickly
• Difficulty maintaining a charge
• Reduced overall usability

Replacing the old battery with a suitable BM4Y 4520mAh battery can help restore dependable battery performance.

Redmi K40 Pro BM4Y Replacement Battery

This 4520mAh BM4Y replacement battery is designed for compatible Xiaomi and POCO smartphones. Its Li-Ion Polymer construction provides a practical replacement solution for devices that require the BM4Y battery.

The battery offers:

• 4520mAh capacity
• 3.87V approximate voltage
• Li-Ion Polymer battery technology
• Approximately 2–3 hours charging time
• Approximately 55.5g weight
• Brand-new condition
• Loose packing
• 180 Days (03 Months) replacement warranty

Important Installation Information

Smartphone batteries are internally installed components and should be replaced carefully.

• Professional installation is recommended.
• Make sure the old battery is disconnected safely before installation.
• Do not puncture, bend, crush, or disassemble the battery.
• Do not use sharp tools directly on the battery.
• Check the battery connector and model number before installation.
• Allow the battery to charge properly after installation.
• If you are not experienced with smartphone repairs, consult a qualified technician.

Warranty Information

This Redmi K40 Pro BM4Y Battery comes with a 180 Days (03 Months) Replacement Warranty.

The warranty is intended to cover manufacturing-related battery defects under normal and proper usage conditions.

Warranty Does Not Cover

Warranty does not cover damage caused by:

• Physical damage
• Improper installation
• Incorrect handling
• Water or liquid damage
• Short circuit
• Puncture, bending, crushing, or breaking
• Swelling caused by improper handling
• Accidental damage
• Misuse or abuse
• Tampering or modification
• Use with incompatible devices

Battery Safety Guidelines

For safe use and longer battery life:

• Keep the battery away from excessive heat and direct fire.
• Do not expose the battery to water or other liquids.
• Do not puncture or bend the battery.
• Do not short-circuit the battery terminals.
• Do not attempt to open or repair the battery cells.
• Stop using the battery if you notice unusual swelling, overheating, or physical damage.
• Keep the battery away from children and pets.
• Always use a compatible charger and device.

Before Ordering

Before purchasing, carefully verify:

1. Your smartphone model.
2. Your existing battery model number.
3. The battery capacity and voltage.
4. The battery connector and physical design.
5. Compatibility with your exact device variant.

For the Xiaomi Redmi K40 Pro, verify that your device model is M2012K11C and that the existing battery model is BM4Y.

Customer Support

For product information, compatibility assistance, or order-related questions:

Email: support@batteryhub.online
Call / WhatsApp: 8356885211
Support Hours: 11:00 AM – 8:00 PM
Sunday: Closed

Frequently Asked Questions

Q1. What is the battery model for the Redmi K40 Pro?

The battery model is BM4Y.

Q2. What is the capacity of the BM4Y battery?

The BM4Y battery has a capacity of 4520mAh.

Q3. What voltage does this battery use?

The battery has an approximate rated voltage of 3.87V.

Q4. Is this battery compatible with the Xiaomi Redmi K40 Pro M2012K11C?

Yes, the supplied compatibility information lists the Xiaomi Redmi K40 Pro (M2012K11C).

Q5. Which other devices are compatible with BM4Y?

The supplied compatibility list includes POCO F3, Mi 11X 5G, Mi 11X Pro 5G, Xiaomi Redmi K40, Xiaomi Redmi K40 Pro, and Xiaomi Redmi K40 Pro+.

Q6. How long is the warranty?

This battery comes with a 180 Days (03 Months) Replacement Warranty.

Q7. Is professional installation recommended?

Yes. Professional installation is recommended because smartphone batteries are internally installed components and require careful handling.

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