High Quality 3.87V 4420mAh/17.1WH XIAOMI BM4Y Battery For Xiaomi Poco F3 Redmi K40 Pro K40 Pro

Do you want to buy a cheap XIAOMI BM4Y Compatible battery? We offer you a cheap XIAOMI BM4Y Compatible battery - an incredibly high quality Compatible battery! All XIAOMI BM4Y are brand new,1 year Warranty, 100% Guarantee Quality and Fully Test!

✔ Battery for BM4Y Ships to Singapore

Product Overview

This battery is suitable as a replacement battery for Xiaomi Poco F3 Redmi K40 Pro K40 Pro battery and XIAOMI BM4Y model.

High capacity XIAOMI BM4Y battery for longer standby time.

The battery is professionally tested to ensure the best lifespan.

1 year warranty, 30 days money back, 100% brand new!

Battery capacity (mAh/A/W) may be different; the more mAh/A/W it displays, the higher its autonomy.

Safety certified CE / FCC / RoHS.

Key Features

• High‑capacity design with 4420mAh/17.1WH for extended device runtime.
• Stable 3.87V output ensures consistent performance during daily use.
• Built with high‑quality lithium‑ion cells for improved durability and long cycle life.
• Advanced protection system including overcharge, over‑discharge, overheat, and short‑circuit safeguards.
• Optimized for reliable performance in warm and humid environments.
• Lightweight and compact design for easy installation and device compatibility.

Technical Specifications

Model	BM4Y
Battery Condition	Brand New Replacement Battery
Item Code	20IV320_Te
Category	Smartphone Batteries
Brand	XIAOMI
Capacity	4420mAh/17.1WH
Voltage	3.87V
Type	Li-ion
Color	black
Applies to	Xiaomi Poco F3 Redmi K40 Pro K40 Pro
Certification	Passed CE, UL, ROHS, ISO 9001/9002 and GS certification
Service	Buy now, we promise a one-year warranty and 30-day returns

Compatible Models

Replacement Part Numbers:

• BM4Y

Compatible Models：

For Xiaomi Poco F3 Redmi K40 Pro K40 Pro

* Please make sure that the replacement battery you are buying is suitable for your device brand and model.

Battery Care & Maintenance

• Store the battery in a cool, dry environment to maintain long‑term performance.
• Avoid exposing the battery to excessive heat or direct sunlight, especially in warm and humid climates.
• Use compatible XIAOMI chargers or certified charging accessories to ensure safe and efficient charging.
• Avoid frequent full discharges; partial charge cycles help extend overall battery lifespan.
• If the battery will not be used for an extended period, keep it at around 40–60% charge before storage.
• Clean the battery contacts periodically with a dry cloth to maintain stable power delivery.
• Do not puncture, crush, or expose the battery to water or high humidity.

Frequently Asked Questions