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BM3K 3200mAh 3.85V Li-ion replacement battery for Xiaomi Mi MIX 3 slider phone, front view on white background
BM3K 3200mAh 3.85V replacement battery for Xiaomi Mi MIX 3, back view showing model number BM3K and capacity specification

BM3K 3200mAh 3.85V Li-ion Battery for Xiaomi Mi MIX 3 Slider Phone 18W Fast Charging

Original price was: $14.99.Current price is: $11.99.

🔘 BM3K 3200mAh 3.85V | 🔋 Li-ion | 📱 For Xiaomi Mi MIX 3 Slider Phone (18W)

8 in stock

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SKU: BM3K 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
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

✅ CE / RoHS / UN38.3 Certified – Safety tested

✅ 3200mAh Capacity – 18W fast charging + 10W wireless charging

✅ For Xiaomi Mi MIX 3 Slider Phone – 2018 ceramic flagship

✅ 90-Day Warranty – Hassle-free replacement

✅ Ships in 3-7 days with tracking – Fast delivery

🛡️ Shipping Protection Available at Checkout – Covered against loss, damage, or theft

✅ PayPal Buyer Protection included – Secure checkout

✅ 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: BM3K
Battery capacity: 3200mAh
Rated voltage: 3.85V
Charge limit voltage: 4.4V-4.45V
Battery type: Li-ion
Compatible with: Xiaomi Mi MIX 3 (2018 Slider Phone)
Package include: 1 x battery
Restore the iconic power of your Xiaomi Mi MIX 3 with this BM3K 3200mAh replacement battery. The Mi MIX 3 features a unique magnetic sliding design that reveals the front camera — a satisfying mechanical action that sets this phone apart. The device also features a 6.39-inch AMOLED display, ceramic back, and supports 18W fast charging plus 10W wireless charging. This Li-ion cell delivers reliable 3200mAh capacity for daily calls, messaging, and apps. Built-in multi-layer safety protection guards against overcharge, over-discharge, and short circuits. Made with grade A cells. CE, RoHS, and UN38.3 certified for safety compliance.
Compatibility Note: Fits Xiaomi Mi MIX 3 (4G model) only. Replacement requires removing two adhesive pull-tabs — professional installation recommended due to the sliding mechanism complexity. European retailers sell this battery for $25-30 with 12-month warranty. Please check your original battery model before purchasing.
Battery Care Tips: Avoid full discharge (keep above 20%). Keep away from high temperatures. If swelling occurs, stop use immediately. For best performance, use the original 18W charger that came with your device. The Mi MIX 3 includes a wireless charger in the box — take advantage of it for convenient top-ups.

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Frequently Asked Questions

The BM3K battery is compatible with Xiaomi Mi MIX 3 (2018 slider phone) only. The Mi MIX 3 features a unique magnetic sliding mechanism to reveal the front camera, a 6.39-inch AMOLED display, and a ceramic back. If your Mi MIX 3 battery is draining too fast or not holding a charge, this is the correct replacement. Please check your original battery model before purchasing.

Yes, this BM3K replacement battery supports the original 18W fast charging (QC 3.0) and 10W wireless charging capabilities of the Mi MIX 3. The phone can charge from 0 to 100% in about 90 minutes using the included fast charger. A wireless charger is also included in the box — a rare inclusion for 2018 flagships. Battery life tests show approximately 8 hours of continuous use on a full charge. If you need a high-capacity replacement battery for your Mi MIX 3, this Li-ion cell is a reliable choice. Made with grade A cells, CE, RoHS, and UN38.3 certified.

Yes, professional installation is strongly recommended for the Mi MIX 3. The phone uses two adhesive pull-tabs to secure the battery, which must be carefully removed. More importantly, the phone features a complex magnetic sliding mechanism — improper disassembly can damage the slider track or the ceramic back cover. Professional repair shops typically charge $15-25 for battery replacement including labor. If you choose to DIY, you will need a heat gun, plastic opening tools, and replacement adhesive. Watch a full disassembly tutorial for the Mi MIX 3 before starting. The sliding mechanism adds extra complexity compared to standard phones.

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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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