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BM4W 4820mAh 3.87V Li-ion Polymer replacement battery for MI 10T Lite 5G and Redmi Note 9 Pro 5G, front view showing battery surface and small 2-pin connector
BM4W 4820mAh 3.87V replacement battery for MI 10T Lite 5G and Redmi Note 9 Pro 5G, back view showing model number BM4W, capacity 4820mAh, and voltage 3.87V on spec label

BM4W 4820mAh 3.87V Battery for MI 10T Lite 5G / Redmi Note 9 Pro 5G Replacement

Original price was: $29.99.Current price is: $23.99.

🔘 BM4W 4820mAh 3.87V | 🔋 Li-ion Polymer | 📱 For MI 10T Lite 5G / Redmi Note 9 Pro 5G 1.5-2 Day Battery Life

8 in stock

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SKU: BM4W Category: Tags: , , , , ,
📦 Shipping, Warranty & After-Sales Information (Click to expand ▼)

✅ Why Our Warranty Stands Out

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Compare✅ Qingsm Tech⚠️ eBay / AliExpress
Warranty Period90 days from delivery15-30 days from order confirmation
When It Starts📦 Upon delivery⚠️ Upon order confirmation (even before you receive it)
Claims HandlingWe do it directly — email usAutomated dispute system, seller dependent
After Window ExpiresStill can contact us for supportNo recourse, seller can ignore you

🔋 90-day warranty is the industry standard for replacement batteries. Batteries naturally lose capacity over time — this normal wear is not covered. Warranty applies to manufacturing defects only.

📦 Shipping Cost & Delivery Time (Economy Shipping from China)

📦 Note: Batteries are classified as hazardous goods and must be shipped via specialized channels, which may take slightly longer than standard couriers. Delivery times are estimates and may be affected by customs, weather, or other unforeseen circumstances. If your country is not listed in the table below, we are currently unable to ship batteries to that destination.

DestinationFreight (USD)Est. Delivery Time
United States$7.808–15 days
Canada$6.8018–30 days
Mexico$10.0030–60 days
Germany, France, United Kingdom, Greece$6.5018–30 days
Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Hungary, Ireland, Italy, Luxembourg, Netherlands, Norway, Poland, Portugal, Slovakia, Spain, Sweden, Switzerland$8.0018–30 days
Croatia, Finland, Lithuania, Latvia, Slovenia$8.0030–50 days
Bulgaria, Romania$14.0030–50 days
South Korea, Japan, Australia, New Zealand, Israel, Malaysia, Singapore, Thailand, Philippines, Kazakhstan$7.5018–30 days
United Arab Emirates, Saudi Arabia, Vietnam, Chile, Peru, Colombia, Brazil$18.0025–60 days

🇧🇷 Note for Brazil: Brazilian customs can occasionally cause delays of up to 80 days or more. And please indicate the recipient's CPF, as it is required for Brazilian customs and shipping. Thanks! We appreciate your understanding.

🇪🇺 Note for EU countries: Due to new EU customs regulations effective July 1, 2026, a flat tariff fee of $4.00 (approx. €3.50) applies to shipments to EU countries. This fee covers customs tariff, handling, and payment processing costs, and will be added at checkout. Thank you for your understanding.

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Description

✅ Condition: Brand New – Never used, factory-tested quality

✅ 4820mAh High Capacity – Restores full battery life for MI 10T Lite 5G and Redmi Note 9 Pro 5G

✅ CE / RoHS / UN38.3 Certified

✅ 90-Day Warranty from delivery – Longer coverage than major platforms

✅ Ships in 3-7 days with tracking

🛡️ Shipping Protection Available at Checkout

✅ PayPal Buyer Protection included

✅ 100% Compatibility Guarantee – If it doesn’t fit, we’ll refund you. No questions asked.

⚠️ Low Stock Alert: Only 8 left in stock. Order now to avoid waiting.

Battery model: BM4W
Capacity: 4820mAh (typical) / 18.65Wh
Rated voltage: 3.87V
Charge limit voltage: 4.45V
Battery type: Li-ion Polymer (Grade A cells)
Compatible with: MI 10T Lite 5G, Redmi Note 9 Pro 5G
Package include: 1 x battery
Revive your MI 10T Lite 5G or Redmi Note 9 Pro 5G with this BM4W 4820mAh replacement battery. Both devices were launched as 5G powerhouses in the mid-range segment — the MI 10T Lite 5G features a 6.67-inch 120Hz display, while the Redmi Note 9 Pro 5G offers flagship-level endurance at an accessible price point. This Li-ion Polymer battery restores the full 4820mAh capacity for all-day and multi-day usage. Built with grade A cells and multi-layer safety protection against overcharge, over-discharge, and short circuits. CE, RoHS, and UN38.3 certified.
Designed for Extended Battery Life: The MI 10T Lite 5G and Redmi Note 9 Pro 5G were designed for users who value long-lasting battery performance with 5G connectivity. The 4820mAh battery originally provided approximately 1.5-2 days of moderate use and up to 15-17 hours of continuous video playback. After years of charging cycles, battery capacity degrades significantly. Common symptoms include: the device requiring daily charging instead of every other day, unexpected shutdowns at 15-25% battery remaining, slower charging than when new, or visible battery swelling. This replacement restores the factory-spec endurance, allowing you to continue enjoying the reliable battery life these devices are known for. The BM4W battery uses advanced high-density cell technology with multi-layer safety protection, ensuring reliable performance for years to come. The battery supports the original 33W fast charging capability, keeping your device powered up quickly when needed.
Compatibility Note: Fits MI 10T Lite 5G and Redmi Note 9 Pro 5G only. Please confirm your battery model before ordering — BM4W is printed on your original battery. This battery is NOT compatible with MI 10T, MI 10T Pro, Redmi Note 9, Redmi Note 9S, Redmi Note 9 Pro (non-5G), Redmi Note 10 series, or other Xiaomi models. The BM4W battery has specific dimensions and connector placement for these two 5G models; using a different battery may cause charging issues or incorrect battery reporting.

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Frequently Asked Questions

The BM4W 4820mAh battery replacement is compatible with MI 10T Lite 5G and Redmi Note 9 Pro 5G only. If you need a BM4W battery for MI 10T Lite 5G or a BM4W battery for Redmi Note 9 Pro 5G, this replacement battery is the exact match. Both devices share the same BM4W battery design, making the BM4W 4820mAh Xiaomi battery a direct drop-in replacement for both 5G smartphones. For BM4W battery compatibility MI 10T Lite 5G, please verify your device model in Settings > About Phone. This battery is NOT compatible with MI 10T, MI 10T Pro, Redmi Note 9 Pro (non-5G), Redmi Note 10 series, or other Xiaomi models. If your MI 10T Lite 5G battery replacement or Redmi Note 9 Pro 5G battery replacement is needed because the old battery no longer holds charge, this BM4W 3.87V 4820mAh Li-ion Polymer battery will restore full performance.

The BM4W 4820mAh battery for MI 10T Lite 5G and Redmi Note 9 Pro 5G has a typical capacity of 4820mAh (18.65Wh) and a rated voltage of 3.87V, with a charge limit of 4.45V. This BM4W 3.87V 4820mAh Li-ion Polymer battery is built with grade A cells and is CE, RoHS, and UN38.3 certified. For BM4W battery life after replacement, expect approximately 1.5-2 days of moderate use on a single charge — restoring the factory endurance that made the MI 10T Lite 5G and Redmi Note 9 Pro 5G famous. The BM4W 4820mAh Xiaomi battery performance supports 33W fast charging, the proprietary quick-charge technology for these 5G models. For best BM4W battery performance MI 10T Lite 5G, allow 2-3 full charge cycles after installation to calibrate the battery meter. The 4.45V charge limit voltage is specifically designed for the 3.87V rated cell to maximize capacity while maintaining safety. If your original Redmi Note 9 Pro 5G battery now requires multiple charges per day instead of lasting all day, this replacement will restore the full 4820mAh capacity and fast charging speed.

Professional MI 10T Lite 5G battery installation or Redmi Note 9 Pro 5G battery installation is recommended. Both devices have a sealed glass back with strong adhesive. To replace MI 10T Lite 5G battery BM4W or replace Redmi Note 9 Pro 5G battery BM4W, the technician must heat the back cover to soften adhesive, carefully pry it open to avoid damaging the display or rear camera module, disconnect the battery's small 2-pin connector, remove the old battery, and install the new BM4W battery before resealing. For BM4W battery installation MI 10T Lite 5G, improper handling can damage the display or compromise the device's water resistance. Third-party repair shops typically charge $20-40 for labor. For MI 10T Lite 5G battery health maintenance and Redmi Note 9 Pro 5G battery care tips: 1) Use the original Xiaomi 33W charger and cable for optimal charging. 2) Keep battery level between 20% and 80% for daily use to maximize the lifespan of the 4820mAh cell. 3) Avoid exposing the phone to high temperatures (above 40°C / 104°F), especially while charging. 4) For long-term storage (over 2 months), keep the battery at approximately 40-60% charge. 5) Perform a full calibration cycle after installation: drain the phone until it auto-shuts off, then charge uninterrupted to 100%. For BM4W battery care tips Redmi Note 9 Pro 5G, stop using immediately if the battery shows any swelling.

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