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BLP799 4500mAh 7.74V dual-cell Li-ion Polymer replacement battery for Realme 7 Pro RMX2170 and Realme X3 Pro RMX2121, front view showing dual-cell construction and small 2-pin connector
BLP799 4500mAh 7.74V dual-cell replacement battery for Realme 7 Pro RMX2170 and Realme X3 Pro RMX2121, back view showing model number BLP799, capacity 4500mAh, and voltage 7.74V on spec label

BLP799 4500mAh 7.74V Li-ion Polymer Dual-Cell Battery for Realme 7 Pro X3 Pro X7 Pro RMX2170 RMX2121 65W SuperDart

Original price was: $32.99.Current price is: $24.99.

🔘 BLP799 4500mAh 7.74V | 🔋 Li-ion Polymer Dual-Cell | 📱 For Realme 7 Pro RMX2170 / X3 Pro RMX2121 / X7 Pro 65W SuperDart

8 in stock

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SKU: BLP799 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 $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

✅ 4500mAh High Capacity – Dual-cell design restores full flagship battery life

✅ 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: BLP799 (dual‑cell series design / 2S)
Capacity: 4500mAh (typical) — 2250mAh × 2 cells in series
Rated voltage: 7.74V (3.87V × 2 cells in series)
Charge limit voltage: 8.9V (4.45V × 2 cells in series)
Battery type: Li‑ion Polymer (dual‑cell, series architecture)
Compatible with: Realme 7 Pro (RMX2170), Realme X3 Pro (RMX2121), Realme X7 Pro
Package include: 1 x BLP799 dual‑cell battery
Restore the full 65W ultra‑fast charging experience on your Realme 7 Pro, X3 Pro, or X7 Pro with this BLP799 dual‑cell replacement battery. These Realme models were among the first to bring 65W charging to the mid‑range market — the 7 Pro (2020) with SuperDart, the X3 Pro (2021) with Snapdragon 860, and the X7 Pro (2020) with MediaTek Dimensity 1000+. This Li‑ion Polymer battery uses a dual‑cell series architecture (7.74V = 3.87V × 2), which is the key to achieving 65W fast charging. Built with grade A cells and multi‑layer safety protection against overcharge, over‑discharge, and short circuits. CE, RoHS, and UN38.3 certified.
Why Dual‑Cell? Why 65W Matters for These Realme Phones: Unlike traditional single‑cell batteries, the BLP799 uses two cells connected in series. This doubles the voltage (7.74V instead of 3.87V), allowing the phone to safely push higher wattage without overheating. Realme’s 65W SuperDart/UltraDart technology can charge these devices from 0% to 100% in approximately 35‑40 minutes — a feature that was industry‑leading at launch. After 3‑4 years of daily use, original BLP799 batteries naturally degrade. You may notice: the phone no longer fast‑charges at full speed, the battery drains noticeably faster, or the device shuts down with 15‑20% remaining. This replacement battery restores the original charging speed and capacity, bringing back the “charge for 5 minutes, game for 2 hours” experience that made these Realme phones stand out. For users who rely on their Realme 7 Pro, X3 Pro, or X7 Pro as a daily driver or gaming device, a fresh BLP799 battery is one of the most cost‑effective upgrades you can make.
Compatibility Note: Fits Realme 7 Pro (RMX2170), Realme X3 Pro (RMX2121), and Realme X7 Pro. Please confirm your battery model before ordering — BLP799 is printed on your original battery. This battery is NOT compatible with Realme 7 (non‑Pro), Realme X3 (non‑Pro), Realme X50 Pro, Realme GT series, or any single‑cell Realme models. The dual‑cell design uses a unique connector and voltage configuration that only works with phones originally designed for 65W SuperDart/UltraDart. Always use the original Realme 65W charger and cable to ensure proper fast charging performance.

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Frequently Asked Questions

The BLP799 dual‑cell battery is compatible with Realme 7 Pro (model RMX2170), Realme X3 Pro (model RMX2121), and Realme X7 Pro. If you need a Realme 7 Pro battery replacement for RMX2170, a Realme X3 Pro battery replacement for RMX2121, or a Realme X7 Pro battery replacement, this BLP799 4500mAh battery is the exact match. All three devices share the same dual‑cell series architecture designed for 65W SuperDart/UltraDart fast charging. For BLP799 battery for Realme 7 Pro, X3 Pro, and X7 Pro compatibility, please verify your device model in Settings > About Phone. This battery is NOT compatible with Realme 7 (non‑Pro), Realme X3 (non‑Pro), Realme X50 Pro, Realme GT series, or any single‑cell Realme models. If your Realme 7 Pro, X3 Pro, or X7 Pro battery drains quickly, charges slowly, or shuts down unexpectedly, this BLP799 replacement battery will restore full performance.

Yes, this BLP799 4500mAh dual‑cell battery fully supports the original 65W fast charging on all three compatible Realme models. The BLP799 7.74V 4500mAh dual‑cell battery uses a series architecture (3.87V × 2 cells) that enables the high‑voltage, high‑current charging required for 65W SuperDart and UltraDart. For Realme 7 Pro 65W battery replacement, expect 0‑100% charge in approximately 35‑40 minutes using the original Realme 65W charger and cable. For Realme X3 Pro 65W battery replacement and Realme X7 Pro 65W battery replacement, performance is identical. The battery is built with grade A Li‑ion Polymer cells and is CE, RoHS, and UN38.3 certified. For Realme dual‑cell 4500mAh battery performance, expect 6‑8 hours of mixed usage, 4‑6 hours of gaming, and 8‑10 hours of video playback. The dual‑cell design also helps keep the phone cooler during fast charging compared to single‑cell high‑voltage solutions. To maintain fast charging speed, always use the original Realme 65W charger and cable — third‑party accessories may not support the proprietary charging protocol.

Professional Realme 7 Pro battery installation is strongly recommended for the BLP799 dual‑cell battery. The Realme 7 Pro, X3 Pro, and X7 Pro have sealed glass backs that require heating to soften adhesive. For BLP799 dual‑cell battery installation Realme 7 Pro, the battery uses a specialized dual‑cell connector — the small 2‑pin connector is keyed and only fits one way. Third‑party repair shops typically charge $20‑35 for labor. Realme official battery replacement costs vary by region, typically $30‑50 for these models. For Realme 65W battery health maintenance: 1) Always use the original Realme 65W charger and cable — using uncertified chargers may not support the proper fast charging protocol and can slow charging dramatically. 2) Avoid charging the phone while gaming for extended periods — the combination of 65W charging heat and processor heat accelerates battery degradation. 3) Keep battery level between 20% and 80% for daily use to maximize lifespan, even though the dual‑cell design is more resilient than single‑cell batteries. 4) For long‑term storage (over 2 months), keep the battery at approximately 60% charge. 5) If the battery becomes swollen, stop using immediately — swelling in a dual‑cell battery can damage the motherboard and display.

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