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BP43 4500mAh 7.74V 2S Li-Polymer replacement battery for Xiaomi Mix 4, front view on white background showing battery surface and connector flex cable
BP43 4500mAh 7.74V replacement battery for Xiaomi Mix 4, back view showing model number BP43, capacity, and voltage on spec label

BP43 4500mAh 7.74V 2S Li-Polymer Replacement Battery for Xiaomi Mix 4 2106118C 120W

Original price was: $39.99.Current price is: $32.99.

🔘 BP43 4500mAh 7.74V | 🔋 2S Li-Polymer | 📱 For Xiaomi Mix 4 2106118C 120W

8 in stock

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SKU: BP43 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

✅ 2S 7.74V 4500mAh – Dual-cell design

✅ 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: BP43
Total capacity: 4500mAh equivalent (Dual-cell series design, 2S)
Single cell capacity: 2250mAh × 2
Rated voltage: 7.74V (2S Li-Polymer)
Charge limit voltage: 8.9V (4.45V × 2)
Battery type: Li-Polymer (Dual-cell configuration)
Compatible with: Xiaomi Mix 4 (2106118C)
Package include: 1 x battery
Restore the battery life of your Xiaomi Mix 4 with this BP43 4500mAh 2S Li-Polymer battery. Released in August 2021, the Mix 4 features a 6.67-inch 120Hz AMOLED display, Snapdragon 888+ processor, and supports 120W wired fast charging and 100W wireless charging. This battery uses a dual-cell series design (2S) — two 2250mAh cells connected in series, delivering a total equivalent capacity of 4500mAh 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 Mix 4 (2106118C) only. This battery uses a dual-cell design (7.74V) — please confirm your original battery voltage before ordering. For reference, European retailers sell this battery for €30 ($32.50), and Chinese retailers for ¥99 ($14). Professional installation is recommended as the phone has a sealed design. Always check your original battery model before purchasing — BP43 printed on your existing battery.
Charging Instructions: Use only a charger designed for 2S Li-Po batteries with Xiaomi fast charging compatibility. The Mix 4 supports 120W wired fast charging — reaching 100% in approximately 15 minutes. Recommended charge current: 2.25A (1C). Never leave the battery unattended while charging. Do not discharge below 6.0V (3.0V per cell).
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 120W charger. If you notice swelling or overheating, stop use immediately.

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Frequently Asked Questions

The BP43 battery is compatible with Xiaomi Mix 4 (model 2106118C). The Mix 4 was released in August 2021 featuring a 6.67-inch 120Hz AMOLED display and supports 120W wired fast charging and 100W wireless charging. If your Mix 4 battery drains quickly or won't hold a charge, this is the correct replacement. For reference, European retailers sell this battery for €30 ($32.50), and Chinese retailers for ¥99 ($14). Please verify your device model before purchasing — BP43 printed on your existing battery.

The BP43 battery has a total equivalent capacity of 4500mAh and a rated voltage of 7.74V. This is because Xiaomi Mix 4 uses a dual-cell series design (2S) — two 2250mAh cells connected in series inside a single battery pack, producing 7.74V total. Full charge voltage is 8.9V (4.45V per cell). Some retailers list the single-cell capacity as 2250mAh, while the total equivalent capacity is 4500mAh. The battery supports the original 120W wired fast charging and 100W wireless charging capabilities of the Mix 4 — reaching 100% in approximately 15 minutes.

Professional installation is strongly recommended. The Xiaomi Mix 4 has a sealed design with strong adhesive. Replacing the battery requires heating to soften adhesive and careful prying to avoid damaging the AMOLED 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. Third-party repair shops typically charge $15-30 for labor. Some Chinese retailers include repair tools and installation tutorials with their batteries for DIY users.

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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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