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BP4U 5400mAh 3.85V Li-ion Polymer replacement battery for Xiaomi 15, front view on white background showing battery surface and connector flex cable

BP4U 5400mAh 3.85V Li-ion Polymer Replacement Battery for Xiaomi 15 24129PN74G 90W Fast Charging

Original price was: $27.99.Current price is: $21.99.

🔘 BP4U 5400mAh 3.85V | 🔋 Li-ion Polymer | 📱 For Xiaomi 15 24129PN74G 90W

8 in stock

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SKU: BP4U Category: Tags: , , ,
📦 Shipping, Warranty & After-Sales Information (Click to expand ▼)

✅ Why Our Warranty Stands Out

Unlike marketplace sellers with short buyer protection windows, we handle claims directly — no automated disputes, no endless back-and-forth.

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
Ireland, Austria, Belgium, Poland, Denmark, Switzerland, Portugal, Norway, Slovakia, Spain, Hungary, Italy, Czech Republic, Luxembourg, Netherlands, Sweden, Cyprus$8.0018–30 days
Croatia, Finland, Lithuania, Latvia, Slovenia$8.0030–50 days
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.

🔋 Can't find your battery model? Use our FREE Battery Lookup Service – tell us your device and we'll find a match within 24 hours. 👉 battery.qingsm.tech/find-my-battery

Description

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

✅ 5400mAh High Capacity – 20.79Wh energy

✅ CE / RoHS / UN38.3 Certified

✅ 90-Day Warranty

✅ 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: BP4U
Typical capacity: 5400mAh / 20.79Wh
Rated capacity: 5260mAh / 20.26Wh
Rated voltage: 3.85V
Charge limit voltage: 4.53V
Battery type: Li-ion Polymer
Cell specification: 1ICP6/62/75
Compatible with: Xiaomi 15 (24129PN74G, 24129PN74I, 24129PN74C)
Package include: 1 x battery
Restore the battery life of your Xiaomi 15 with this BP4U 5400mAh replacement battery. Released in October 2024, the Xiaomi 15 features a 6.36-inch AMOLED display and supports 90W wired fast charging and 50W wireless charging. This Li-ion Polymer battery delivers the factory-rated 5400mAh typical capacity for all-day use. Built with grade A cells and multi-layer safety protection against overcharge, over-discharge, and short circuits. CE, RoHS, and UN38.3 certified.
Compatibility Note: Fits Xiaomi 15 (24129PN74G, 24129PN74I, 24129PN74C) only. Please confirm your battery model before ordering — BP4U printed on your existing battery. For reference, Xiaomi official battery replacement costs 127.2 RMB ($17.50) during service week promotions and approximately 159 RMB ($22) regularly, including installation. Professional installation is recommended as the phone has a sealed design.
Battery Care Tips: Avoid full discharge — keep battery level above 20%. Do not expose to high temperatures or direct sunlight. New batteries require 3-5 full charge cycles to reach optimal capacity. For best lifespan, use a certified 90W charger. If you notice swelling or overheating, stop use immediately.

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Frequently Asked Questions

The BP4U battery is compatible with Xiaomi 15 (models 24129PN74G, 24129PN74I, 24129PN74C). The Xiaomi 15 was released in October 2024 featuring a 6.36-inch AMOLED display and supports 90W fast charging. If your Xiaomi 15 battery drains quickly or won't hold a charge, this is the correct replacement. For reference, Xiaomi official battery replacement costs 127.2 RMB ($17.50) during service week promotions and approximately 159 RMB ($22) regularly, including installation. Please verify your device model in Settings > About Phone before purchasing.

The BP4U battery has a typical capacity of 5400mAh (rated capacity 5260mAh) and a rated voltage of 3.85V. Charge limit voltage is 4.53V. It is a Li-ion Polymer battery built with grade A cells and is CE, RoHS, and UN38.3 certified. The battery supports the original 90W wired fast charging and 50W wireless charging capabilities of the Xiaomi 15. For reference, third-party retailers sell this battery for $10-20, and the Xiaomi 15 features a 6.36-inch 120Hz AMOLED display with Snapdragon 8 Gen 4 processor.

Professional installation is strongly recommended. The Xiaomi 15 has a sealed design with strong adhesive. Replacing the battery requires heating to soften adhesive and careful prying to avoid damaging the display. If you choose to DIY, watch a full teardown tutorial before starting, use a heat gun at low temperature (no more than 70°C), and never reuse a battery after removal. Incorrect installation may damage the phone or break water resistance. Xiaomi official service charges 127.2-159 RMB ($17.50-22) including installation, and third-party repair shops typically charge $15-30 for labor.

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This battery is in stock and ready to ship within 3-7 days. 90-day warranty included.

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