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BN66 6000mAh 3.87V Li-Polymer replacement battery for Xiaomi Poco C40, front view showing battery label and connector flex cable

BN66 6000mAh 3.87V Li-Polymer Replacement Battery for Xiaomi Poco C40

Original price was: $19.99.Current price is: $15.99.

🔘 BN66 6000mAh 3.87V | 🔋 Li-Polymer | 📱 Compatible with Xiaomi Poco C40 18W

8 in stock

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SKU: BN66 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

✅ Built‑in Overcharge / Over‑discharge / Short Circuit / Overcurrent Protection

✅ 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: BN66 (Replaces OEM XM46020000B8LM)
Capacity: 6000mAh (Typical) / 23.2Wh
Rated voltage: 3.87V
Charge limit voltage: 4.4V
Battery type: Li-Polymer / Li-ion
Compatible with: Xiaomi Poco C40 (220333QPC)
Replaces OEM part number: BN66, XM46020000B8LM
Package include: 1 x battery
Keep your Xiaomi Poco C40 powered through the day with this BN66 6000mAh replacement battery. The Poco C40 was released in June 2022, featuring a 6.71-inch HD+ display, JLQ JR510 octa-core processor, and supports 18W fast charging via USB Type-C — the massive 6000mAh battery delivers up to 20 hours of video playback, 32 hours of talk time, or 17 hours of navigation on a single full charge. This Li-Polymer battery restores the factory-rated 6000mAh capacity and 23.2Wh energy, ensuring extended power for calls, streaming, gaming, and daily use.
Built with Grade A Li-Polymer cells and multi‑layer safety protection against overcharge, over‑discharge, short circuit, and overcurrent. CE, RoHS, and UN38.3 certified for safe transport and use. The Poco C40 supports 18W fast charging — while the phone ships with a 10W charger, an 18W charger can fully charge the 6000mAh battery in approximately 2.5-3 hours. With a cycle life of 500+ full charge cycles, this replacement battery is designed for long‑term reliability. Professional installation is strongly recommended as the battery is not user‑replaceable.
Compatibility Note: Please power down your device and check your original battery label before ordering. This battery is compatible with Xiaomi Poco C40 (model 220333QPC) only. The phone has no official IP water resistance rating, so water seal maintenance is not a concern after replacement.
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 18W fast charging performance, use a certified 18W charger compatible with Xiaomi fast charging protocols. If you don’t use the device for a long time, store it in a dry and cool place and charge it fully once every three months. If you notice swelling or overheating, stop use immediately.

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Frequently Asked Questions

This BN66 battery for Xiaomi Poco C40 is compatible with Xiaomi Poco C40 (model 220333QPC, released June 2022, 6.71-inch HD+ display, JLQ JR510 processor, 6000mAh battery, 18W fast charging). The device features a massive 6000mAh battery that provides up to 20 hours of video playback, 32 hours of talk time, or 17 hours of navigation on a single full charge. This BN66 Li-Polymer replacement battery for Xiaomi Poco C40 delivers the factory-rated 6000mAh capacity (23.2Wh). If your Xiaomi Poco C40 battery replacement is needed because the phone drains quickly or won't hold a charge, this is the correct battery. Please verify your device model in Settings > About Phone and check the battery model BN66 printed on your existing battery before purchasing.

The BN66 6000mAh 3.87V battery has a typical capacity of 6000mAh (23.2Wh) and a rated voltage of 3.87V. Charge limit voltage is 4.4V. This BN66 Li-Polymer battery is built with Grade A cells and is CE, RoHS, and UN38.3 certified. The BN66 battery with 23.2Wh energy supports 18W fast charging — the Xiaomi Poco C40 can be fully charged in approximately 2.5-3 hours when paired with an 18W charger. According to official specifications, the 6000mAh battery provides up to 20 hours of video playback, 32 hours of talk time, 86 hours of music playback, or 17 hours of navigation on a single full charge. With a cycle life of 500+ full charge cycles, this BN66 replacement battery is designed for long-term durability. For best results, always use a certified 18W charger compatible with Xiaomi fast charging protocols.

Professional installation is strongly recommended for Xiaomi Poco C40 battery replacement. The Poco C40 has a sealed design with a plastic back cover secured by strong adhesive — the battery is not user‑replaceable. The process to replace BN66 battery in Xiaomi Poco C40 requires heating to soften adhesive, careful prying with plastic tools to avoid damaging the display, and proper reassembly. The phone has no official IP water resistance rating, so water seal maintenance is not a concern after replacement. If you choose DIY phone battery replacement, 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.

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