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BLPA77 5100mAh 3.91V Li-ion Polymer replacement battery for OPPO A3X, A3 Energy, A3i 5G, and A3 PRO 5G, front view showing battery surface and small 2-pin connector
BLPA77 5100mAh 3.91V replacement battery for OPPO A3X, A3 Energy, A3i 5G, and A3 PRO 5G, back view showing model number BLPA77, capacity 5100mAh, and voltage 3.91V on spec label

BLPA77 5100mAh 3.91V Battery for OPPO A3X/A3 Energy/A3i 5G/A3 PRO 5G Replacement

Original price was: $29.99.Current price is: $22.99.

🔘 BLPA77 5100mAh 3.91V | 🔋 Li-ion Polymer | 📱 For OPPO A3X/A3 Energy/A3i 5G/A3 PRO 5G 45W Fast Charging

8 in stock

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SKU: BLPA77 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 $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: Brand New – Never used, factory-tested quality

✅ 5100mAh High Capacity – Restores full battery life for OPPO A3X, A3 Energy, A3i 5G, and A3 PRO 5G

✅ 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: BLPA77
Capacity: 5100mAh (typical) / 19.94Wh
Rated voltage: 3.91V
Charge limit voltage: 4.45V
Battery type: Li-ion Polymer (Grade A cells)
Compatible with: OPPO A3X 4G/5G, OPPO A3 Energy 5G, OPPO A3i 5G, OPPO A3 PRO 5G
Package include: 1 x battery
Restore the exceptional battery performance of your OPPO A3 series device with this BLPA77 5100mAh replacement battery. The OPPO A3 family — including the A3X, A3 Energy, A3i 5G, and A3 PRO 5G — is designed around a high-capacity battery that delivers all-day endurance. The A3X features a 6.67-inch HD+ display and 45W SUPERVOOC fast charging, while the A3 PRO 5G offers enhanced 5G connectivity and a premium build. The A3 Energy comes with a 6.67-inch display, 120Hz refresh rate, and the MediaTek Dimensity 6300 chipset. After 1‑2 years of daily charging cycles, the factory battery capacity naturally degrades. This Li‑ion Polymer battery restores the full 5100mAh capacity, bringing back the extended endurance these devices were designed 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 All‑Day Endurance: The OPPO A3 series is built for users who value long‑lasting battery performance. The 5100mAh battery originally provided approximately a full day of heavy use and up to 1.5‑2 days of moderate use. OPPO emphasizes that the battery retains over 80% capacity after 1600 charge cycles, ensuring four years of reliable use. After extensive use, the original battery capacity degrades significantly. Common symptoms include: the device requiring daily charging instead of lasting through the day, unexpected shutdowns at 15‑25% battery remaining, slower charging than when new, or visible battery swelling. This replacement restores the factory‑spec 5100mAh capacity and supports the original 45W SUPERVOOC fast charging, 33W UFCS universal fast charging, and 13.5W PD charging. The battery uses high‑density cell technology with precise voltage control, ensuring stable output and compatibility with the device’s original charging circuitry.
Compatibility Note: Fits OPPO A3X 4G/5G, OPPO A3 Energy 5G, OPPO A3i 5G, and OPPO A3 PRO 5G only. Please confirm your battery model before ordering — BLPA77 is printed on your original battery. Key model numbers include CPH2641 (A3X 4G), CPH2639 (A3 PRO 5G), and PKD110 (A3 Energy 5G). This battery is NOT compatible with OPPO A3 (non‑series), OPPO A3s, OPPO A5 series, OPPO A9 series, OPPO Find series, or other OPPO models. The BLPA77 battery has specific dimensions and connector layout; using a different battery model may cause charging issues or incorrect battery reporting.

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Frequently Asked Questions

The BLPA77 5100mAh battery replacement is compatible with OPPO A3X 4G/5G, OPPO A3 Energy 5G, OPPO A3i 5G, and OPPO A3 PRO 5G. If you need a BLPA77 battery for OPPO A3X or a BLPA77 battery for OPPO A3 PRO 5G, this replacement battery is the exact match. For BLPA77 battery compatibility, please verify your battery model printed on the original unit — BLPA77 is the correct model for these devices. Key model numbers include CPH2641 for A3X, CPH2639 for A3 PRO 5G, and PKD110 for A3 Energy 5G. This battery is NOT compatible with OPPO A3s, OPPO A5 series, OPPO A9 series, OPPO Find series, or other OPPO models. If your current OPPO A3X battery or OPPO A3 Energy battery now drains quickly or shuts down unexpectedly, this BLPA77 3.91V 5100mAh Li‑ion Polymer battery will restore full endurance and reliability.

The BLPA77 5100mAh battery for OPPO A3X, A3 Energy, A3i 5G, and A3 PRO 5G has a typical capacity of 5100mAh (19.94Wh) and a rated voltage of 3.91V, with a charge limit of 4.45V. This BLPA77 3.91V 5100mAh Li‑ion Polymer battery is built with grade A cells and is CE, RoHS, and UN38.3 certified. For BLPA77 battery performance, the battery supports the original 45W SUPERVOOC fast charging, 33W UFCS universal fast charging, and 13.5W PD charging. For best BLPA77 battery performance OPPO A3 PRO 5G, allow 2‑3 full charge cycles after installation to calibrate the battery meter. The OPPO A3X 5100mAh battery performance provides excellent endurance for 5G connectivity, streaming, gaming, and daily tasks. If your original OPPO A3i 5G battery now requires more frequent charging instead of lasting all day, this replacement will restore the full 5100mAh capacity and fast charging speed.

Professional BLPA77 battery installation is recommended for OPPO A3X, A3 Energy, A3i 5G, and A3 PRO 5G. These devices have a sealed design with strong adhesive. To replace BLPA77 battery in OPPO A3X or replace BLPA77 battery in OPPO A3 PRO 5G, the technician must heat the back cover to soften adhesive, carefully pry it open to avoid damaging the display or fingerprint sensor, disconnect the battery's small 2‑pin connector, remove the old battery, and install the new BLPA77 battery before resealing to maintain the device's protection. For BLPA77 battery installation OPPO A3 Energy, improper handling can damage the display or internal components. For BLPA77 battery health maintenance and OPPO A3X battery care tips: 1) Use the original OPPO charger and cable for optimal 45W SUPERVOOC charging. 2) Keep battery level between 20% and 80% for daily use to maximize the lifespan of the 5100mAh cell. 3) Avoid exposing the phone 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 phone until it auto‑shuts off, then charge uninterrupted to 100%. For BLPA77 battery care tips OPPO A3 PRO 5G, stop using immediately if the battery shows any swelling.

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