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BL-49KX 5000mAh 3.87V Li-Polymer replacement battery for Infinix Note 11 X663 and Note 12 Pro, front view on white background showing battery surface and connector flex cable
BL-49KX 5000mAh 3.87V replacement battery for Infinix Note 11 (X663) and Note 12 Pro, back view showing model number BL-49KX, capacity 5000mAh, and voltage 3.87V on spec label

BL-49KX 5000mAh 3.87V Li-Polymer Replacement Battery for Infinix Note 11 X663 / Note 12 / Note 12 Pro

Original price was: $16.99.Current price is: $12.99.

🔘 BL-49KX 5000mAh 3.87V | 🔋 Li-Polymer | 📱 Compatible with Infinix Note 11 X663 / Note 12 Pro / Note 12i

8 in stock

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SKU: BL-49KX 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

✅ 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

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

Battery model: BL-49KX
Capacity: 5000mAh / 19.35Wh
Rated voltage: 3.87V
Charge limit voltage: 4.45V
Battery type: Li-Polymer
Compatible with: Infinix Note 11 (X663), Note 12, Note 12 Pro, Note 12i (X6819), Note 12 5G (X671)
Package include: 1 x battery
Extend the life of your Infinix Note series with this high-density BL-49KX 5000mAh replacement battery. Compatible with various Infinix models such as Note 11, Note 12, and Note 12 Pro, this Li-Polymer battery matches the original specifications. It delivers a full day’s power, allowing you to stream, play games, and browse without constantly searching for a charger.
Safety meets performance with this Grade-A cell battery. It features multi-layer protection against overcharging, over-discharging, and short circuits. Rigorously tested and certified with CE, RoHS, and UN38.3 standards for global compatibility and safety. If your battery is swelling, draining rapidly, or your phone shuts down unexpectedly, this replacement is the solution.
Important Compatibility Note: Please power down your device and physically check the label on your old battery before ordering. Ensure the model number printed matches BL-49KX (and not BL-49FX which is for Hot series). For reference, third-party retailers sell this battery for approximately $13 to $18. Professional repair shops typically charge $15-$25 for installation service.
Battery Care Tips: Avoid frequent deep discharges (below 20%) to extend lifespan. Use a standard 5V/2A charger or the original Infinix charger for optimal health. New batteries require 3 to 5 full charge cycles to reach maximum capacity.

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Frequently Asked Questions

The BL-49KX battery for Infinix Note 11 X663 works perfectly for Note 11 (X663), Note 12, and Note 12 Pro models. It also fits the battery replacement for Infinix Note 12i and the Note 12 5G variants. We highly recommend you check your device's "About Phone" settings to confirm the model number, but more importantly, pop out the old battery and verify it says BL-49KX. The 5000mAh battery for Infinix Note 12 provides the same voltage and size as the original.

The BL-49KX 5000mAh 3.87V battery has a rated capacity of 5000mAh (19.35Wh) and a standard voltage of 3.87V with a cut-off at 4.45V. It is a High-Capacity Li-Polymer battery for Note 12 Pro that supports the manufacturer's 33W Flash Charge technology (present in Note 11 and Note 12 series). To achieve the best fast charging results, please use the original Infinix power adapter and USB cable that came with your phone.

For proper Infinix Note 12 battery installation, you will need to carefully heat the back cover to soften the adhesive. Use plastic picks to gently separate the back cover without cracking it. Once the midframe screws are removed, disconnect the old BL-49KX battery and replace it. If you are not confident about repair, we recommend having a professional do the replacement for the Infinix Note 12 Pro. The DIY phone battery replacement process is tricky due to the strong seal on these budget 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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