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QR30 2950mAh and QR10 1050mAh 3.88V Li-ion Polymer replacement battery set for Motorola Razr 50 Ultra XT2451-4, front view showing both battery cells and small 2-pin connectors

QR30 QR10 4000mAh 3.88V Battery for Motorola Razr 50 Ultra XT2451-4 Replacement

Original price was: $52.99.Current price is: $45.99.

🔘 QR30 + QR10 4000mAh 3.88V | 🔋 Li-ion Polymer | 📱 For Motorola Razr 50 Ultra XT2451-4

8 in stock

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SKU: QR30-QR10 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

✅ 4000mAh High Capacity – Restores full battery life for Motorola Razr 50 Ultra

✅ 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

✅ 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: QR30 + QR10 (paired set)
QR30 Capacity: 2950mAh (typical) / 11.45Wh
QR10 Capacity: 1050mAh (typical) / 4.08Wh
Combined Capacity: 4000mAh (equivalent)
Rated voltage: 3.88V
Charge limit voltage: 4.45V
Battery type: Li-ion Polymer (Grade A cells, dual-cell configuration)
Compatible with: Motorola Razr 50 Ultra (XT2451-4 / XT2451), Motorola Razr+ 2024, Motorola Razr+ 2025 (XT2557)
Also replaces: SB18E07971 (QR30), SB18E07970 (QR10)
Package include: 1 x battery set (QR30 + QR10)
Restore the reliable battery performance of your Motorola Razr 50 Ultra with this QR30 + QR10 4000mAh replacement battery set. The Razr 50 Ultra features a 6.9-inch pOLED inner display with 165Hz refresh rate and a 3.6-inch outer display, powered by the Qualcomm Snapdragon 8s Gen 3 processor with 12GB RAM. After 1-2 years of regular charging cycles, the original battery’s capacity naturally declines. This Li-ion Polymer battery set restores the full 4000mAh equivalent 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 Razr 50 Ultra uses a dual-cell battery system – the QR30 main battery (2950mAh) and QR10 secondary battery (1050mAh) work together to provide a combined 4000mAh equivalent capacity at 3.88V, supporting 45W wired fast charging and 15W wireless charging. 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 set restores the original endurance, allowing you to continue using your Motorola Razr 50 Ultra without interruption. The QR30 and QR10 batteries use advanced high-density cell technology with multi-layer safety protection, ensuring reliable performance for years to come.
Compatibility Note: Fits Motorola Razr 50 Ultra (XT2451-4 / XT2451), Motorola Razr+ 2024, and Motorola Razr+ 2025 (XT2557) only. This is a paired battery set – QR30 and QR10 must be replaced together for proper function. Please confirm your battery models before ordering – QR30 and QR10 are printed on your original batteries. This set also replaces part numbers SB18E07971 (QR30) and SB18E07970 (QR10). The Razr 50 Ultra uses a specific dual-cell battery configuration with precise dimensions; using a different battery model may cause improper fit, charging issues, or incorrect battery reporting.

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Frequently Asked Questions

The QR30 and QR10 battery set for Motorola Razr 50 Ultra is compatible with Motorola Razr 50 Ultra (XT2451-4 / XT2451), Motorola Razr+ 2024, and Motorola Razr+ 2025 (XT2557). If you need a Motorola Razr 50 Ultra battery replacement, this QR30 2950mAh and QR10 1050mAh paired set is the exact match. For QR30 QR10 battery for Motorola Razr 50 Ultra compatibility, please check the labels on your original batteries – the model numbers QR30 and QR10 are printed there. This set also replaces part numbers SB18E07971 and SB18E07970. The Razr 50 Ultra uses a dual-cell design with QR30 and QR10 working together. This battery set is NOT compatible with other Motorola models. If your Motorola Razr 50 Ultra battery no longer holds charge as it did when new or shuts down unexpectedly, this QR30 and QR10 replacement set will restore the full performance.

The QR30 and QR10 battery set for Motorola Razr 50 Ultra features a dual-cell configuration with one 2950mAh cell (QR30, 11.45Wh) and one 1050mAh cell (QR10, 4.08Wh), providing a total equivalent capacity of 4000mAh. Both batteries share a rated voltage of 3.88V, with a charge limit of 4.45V. This QR30 3.88V 2950mAh Li-ion Polymer battery and QR10 3.88V 1050mAh Li-ion Polymer battery are built with Grade A cells and are CE, RoHS, and UN38.3 certified. The Motorola Razr 50 Ultra battery supports 45W wired fast charging and 15W wireless charging. 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 replacement set will restore the original capacity.

Professional Motorola Razr 50 Ultra battery installation is required. The Razr 50 Ultra is a foldable device with a complex sealed design requiring specialized handling. To replace Motorola Razr 50 Ultra batteries QR30 and QR10, the technician must carefully open the device following Motorola's service procedures, disconnect both batteries' small 2-pin connectors, remove the old QR30 and QR10 battery cells, and install the new paired set before resealing the device. For QR30 and QR10 battery installation Motorola Razr 50 Ultra, improper handling can damage the display, hinge mechanism, or compromise the device's sealing. Authorized service centers are strongly recommended. For Motorola Razr 50 Ultra battery health maintenance: 1) Use the original 45W charger and cable for optimal charging. 2) Keep battery level between 20% and 80% for daily use to maximize the lifespan of both cells. 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 Motorola Razr 50 Ultra battery care tips, stop using immediately if the battery shows any swelling.

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