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BL-51CX 5200mAh 3.86V Li-ion Polymer replacement battery for devices requiring BL-51CX battery model, front view showing battery surface and small 2-pin connector

BL-51CX 5200mAh 3.86V Battery Replacement

Original price was: $69.99.Current price is: $59.99.

🔘 BL-51CX 5200mAh 3.86V | 🔋 Li-ion Polymer | 📱 For Devices Using BL-51CX

8 in stock

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SKU: BL-51CX 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, Czech Republic, Denmark, Estonia, Hungary, Ireland, Italy, Luxembourg, Netherlands, Norway, Poland, Portugal, Slovakia, Spain, Sweden, Switzerland, Ukraine$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: New – Factory-tested quality & Warranty

✅ 5200mAh High Capacity – Restores full battery life for devices requiring BL-51CX

✅ 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-51CX
Capacity: 5200mAh (typical) / 20.07Wh
Rated voltage: 3.86V
Charge limit voltage: 4.4V
Battery type: Li-ion Polymer (Grade A cells)
Compatible with: Devices requiring BL-51CX battery model
Package include: 1 x battery
Restore the reliable battery performance of your compatible device with this BL-51CX 5200mAh replacement battery. After 1-2 years of regular charging cycles, the original battery’s capacity naturally declines. This Li-ion Polymer battery restores the full 5200mAh capacity, bringing back the consistent daily endurance your device was built for. Built with Grade A cells and multi-layer safety protection against overcharge, over-discharge, and short circuits. CE, RoHS, and UN38.3 certified.
Designed for Reliable Daily Use: The 5200mAh battery provides extended runtime for daily tasks, multimedia, and connectivity. After years of charging cycles, battery capacity degrades significantly. Common symptoms include: the device requiring more frequent charging than when new, unexpected shutdowns at 15-20% battery remaining, slower charging than when new, or visible battery swelling. This replacement restores the original endurance, allowing you to continue using your device without interruption. The BL-51CX battery uses advanced high-density cell technology with multi-layer safety protection, ensuring reliable performance for years to come.
Compatibility Note: Fits devices that use battery model BL-51CX. Please confirm your battery model before ordering — BL-51CX is printed on your original battery. Verify that your current battery matches the model number, rated voltage (3.86V), and capacity (5200mAh / 20.07Wh). Using an incorrect battery model may cause improper fit, charging issues, or incorrect battery reporting.

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Frequently Asked Questions

The BL-51CX 5200mAh battery is compatible with devices that use this specific battery model. For BL-51CX battery compatibility, please check your original battery to verify the model number is BL-51CX. The battery model number is printed on the battery label. Ensure your current battery also has a 3.86V rated voltage and similar physical dimensions. This BL-51CX 5200mAh battery is designed for specific devices using this exact part number. BL-51CX battery capacity is 5200mAh. Please verify your device's original battery model before ordering to ensure proper fit and performance.

The BL-51CX 5200mAh 3.86V battery has a typical capacity of 5200mAh (20.07Wh) and a rated voltage of 3.86V, with a charge limit of 4.4V. This BL-51CX 3.86V 5200mAh Li-ion Polymer battery is built with Grade A cells and is CE, RoHS, and UN38.3 certified. BL-51CX battery specifications are designed for reliable daily performance. For best performance, allow 2-3 full charge cycles after installation to calibrate the battery meter. If your original battery now requires more frequent charging than when new, this BL-51CX replacement battery will restore the original capacity.

Professional battery installation is recommended for devices using the BL-51CX battery. The device may have either a removable back cover or a sealed design depending on the model. To replace the BL-51CX battery, the technician must carefully open the device following proper procedures, disconnect the battery's small 2-pin connector, remove the old battery, and install the new BL-51CX battery before reassembling. For BL-51CX battery installation, improper handling can damage the connector or device. For battery health maintenance: 1) Use the original charger and cable for optimal charging. 2) Keep battery level between 20% and 80% for daily use to maximize the lifespan of the 5200mAh cell. 3) Avoid exposing the device to high temperatures (above 40°C / 104°F), especially while charging. 4) For long-term storage (over 2 months), keep the battery at approximately 40-60% charge. 5) Perform a full calibration cycle after installation: drain the device until it auto-shuts off, then charge uninterrupted to 100%. For BL-51CX battery care tips, stop using immediately if the battery shows any swelling.

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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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