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B-X3 5000mAh equivalent 7.78V Li-Polymer dual-cell replacement battery for Vivo iQOO 11, front view showing battery label and dual-cell connector
B-X3 5000mAh equivalent 7.78V replacement battery for Vivo iQOO 11, back view showing model number B-X3, equivalent capacity 5000mAh, and voltage 7.78V on spec label

B-X3 5000mAh Equivalent 7.78V Li-Polymer Dual-Cell Replacement Battery for Vivo iQOO 11 120W FlashCharge

Original price was: $35.99.Current price is: $27.99.

🔘 B-X3 5000mAh Equivalent 7.78V | 🔋 Dual-Cell Li-Polymer | 📱 Compatible with Vivo iQOO 11 120W FlashCharge

8 in stock

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SKU: B-X3 Category: Tags: , ,
📦 Shipping, Warranty & After-Sales Information (Click to expand ▼)

✅ Why Our Warranty Stands Out

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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 $6.00 (approx. €5.20) 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 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: B-X3
Total capacity (equivalent): 5000mAh / 19.45Wh
Single cell capacity: 2500mAh each (2 cells in series)
Rated voltage (pack output): 7.78V (3.89V × 2)
Single cell voltage: 3.89V
Charge limit voltage (single cell): 4.45V
Battery type: Li-Polymer (Dual‑cell series design)
Manufacturer: Huizhou Desay Battery Co., Ltd.
Compatible with: Vivo iQOO 11 (2022 release, 6.78-inch 144Hz 2K AMOLED display, Qualcomm Snapdragon 8 Gen 2 processor, 50MP OIS triple camera, self-developed V2 imaging chip, 120W FlashCharge support)
Replaces OEM part number: B-X3
Package include: 1 x battery (dual-cell integrated pack)
Restore the elite gaming performance of your Vivo iQOO 11 with this B-X3 5000mAh equivalent replacement battery. The iQOO 11 was released in December 2022, featuring a 6.78-inch 144Hz 2K AMOLED display (E6 material), Qualcomm Snapdragon 8 Gen 2 processor, and supports 120W FlashCharge fast charging — capable of reaching 50% in just 7 minutes and fully charged in 25 minutes. This Li-Polymer battery uses a dual‑cell series design — two 2500mAh/3.89V cells connected in series to achieve a combined output of 7.78V, delivering the factory‑rated equivalent 5000mAh capacity for extended gaming sessions, 5G connectivity, and intensive multitasking. For reference, third‑party retailers sell this battery for approximately $25 to $45.
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. With a cycle life of 500+ full charge cycles, this replacement battery is designed for long‑term durability. Professional installation is strongly recommended as the battery is not user‑replaceable — the phone has a sealed glass back cover with strong adhesive.
Compatibility Note: Please power down your device and check your original battery label before ordering. This battery is compatible with Vivo iQOO 11 (standard model) only — NOT compatible with iQOO 11 Pro (which uses B-X9 with 4700mAh) or iQOO 11S. The phone has no official IP68 water resistance rating — some sources indicate IP53 splash resistance, but no guaranteed submersion protection. Water seal maintenance is not a major 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 120W FlashCharge performance, use the original Vivo 120W charger and cable that came with your phone. 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

The B-X3 battery for Vivo iQOO 11 is compatible with Vivo iQOO 11 (standard model, released December 2022) only. The iQOO 11 features a 6.78-inch 144Hz 2K AMOLED display (E6 material, 1800 nits peak brightness), Qualcomm Snapdragon 8 Gen 2 processor, 50MP OIS triple camera (Samsung GN5 sensor, 13MP 2x telephoto, 8MP ultra-wide), self-developed V2 imaging chip, 5000mAh equivalent battery (dual-cell, 2500mAh×2, 7.78V), and supports 120W FlashCharge — 0% to 50% in 7 minutes, 0% to 100% in 25 minutes. This B-X3 Li-Polymer dual-cell replacement battery for Vivo iQOO 11 delivers the factory-rated equivalent 5000mAh capacity (19.45Wh). Important: This battery is NOT compatible with iQOO 11 Pro (which uses B-X9, 4700mAh, 200W FlashCharge) or iQOO 11S. If your Vivo iQOO 11 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 B-X3 printed on your existing battery before purchasing.

The B-X3 5000mAh equivalent 7.78V battery has a typical equivalent capacity of 5000mAh (19.45Wh) and a pack output voltage of 7.78V. It is a dual‑cell Li-Polymer battery — two 2500mAh/3.89V single cells connected in series (7.78V = 3.89V × 2). Single‑cell charge limit voltage is 4.45V. The battery is manufactured by Huizhou Desay Battery Co., Ltd., with original B-X3 cells bearing 'VIVO POWER' branding. This B-X3 Li-Polymer battery is built with Grade A cells and is CE, RoHS, and UN38.3 certified. The Vivo iQOO 11 supports 120W FlashCharge — when paired with the original Vivo 120W charger, the dual‑cell battery can charge from 0% to 50% in just 7 minutes and from 0% to 100% in approximately 25 minutes (officially tested). The phone also supports PD3.0 fast charging protocols. The device has no official IP68 water resistance rating (some sources indicate IP53 splash protection). With a cycle life of 500+ full charge cycles, this B-X3 replacement battery is designed for long-term durability. For best results, always use the original Vivo 120W FlashCharge charger that came with your phone.

Professional installation is strongly recommended for Vivo iQOO 11 battery replacement. The iQOO 11 has a sealed design with a glass back cover secured by strong adhesive — the battery is not user‑replaceable. The process to replace B-X3 battery in Vivo iQOO 11 requires heating to soften adhesive, careful prying with plastic tools to avoid damaging the 6.78-inch 144Hz AMOLED display, and proper reassembly. The phone has no official IP68 water resistance rating — the iQOO 11 is not certified for submersion protection, so water seal maintenance is not a major 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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