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BLP661 3400mAh 3.85V Li-ion Polymer replacement battery for OPPO A3 and OPPO F7 CPH1819, front view showing battery surface and small 2-pin connector

BLP661 3400mAh 3.85V Battery for OPPO A3 F7 CPH1819 Replacement

Original price was: $26.99.Current price is: $19.99.

🔘 BLP661 3400mAh 3.85V | 🔋 Li-ion Polymer | 📱 For OPPO A3 / F7 / PADM00 / CPH1819 VOOC Fast Charging

8 in stock

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📦 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 $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

✅ 3400mAh High Capacity – Restores full battery life for OPPO A3, OPPO F7, and CPH1819

✅ 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: BLP661
Capacity: 3400mAh (typical) / 13.09Wh
Rated voltage: 3.85V
Charge limit voltage: 4.4V
Battery type: Li-ion Polymer (Grade A cells)
Compatible with: OPPO A3, OPPO F7 (PADM00, CPH1819)
Package include: 1 x battery
Restore the reliable battery performance of your OPPO A3 or OPPO F7 with this BLP661 3400mAh replacement battery. The OPPO A3, launched in 2018, features a 6.2-inch FHD+ display and a sleek glass design, while the OPPO F7 (also known as PADM00 and CPH1819) was released around the same time with a 6.23-inch display and a 25MP AI-enhanced front camera. Both devices were popular for their balanced performance and stylish aesthetics. After years of daily charging cycles, the original battery capacity naturally degrades. This Li‑ion Polymer battery restores the full 3400mAh capacity, bringing back the dependable 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 Reliable Daily Performance: The OPPO A3 and OPPO F7 were designed for users who need a reliable companion for daily tasks, social media, and entertainment. The 3400mAh battery originally provided a full day of moderate use. After 4-5 years of use, the original battery capacity degrades significantly. Common symptoms include: the device requiring more frequent charging, unexpected shutdowns at 20-30% battery remaining, slower charging than when new, or visible battery swelling. This replacement restores the factory‑spec 3400mAh capacity and supports the original VOOC fast charging technology. 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 A3, OPPO F7 (PADM00, CPH1819) only. Please confirm your battery model before ordering — BLP661 is printed on your original battery. This battery is NOT compatible with OPPO A3s, OPPO A3x, OPPO A5 series, OPPO A9 series, OPPO F5, OPPO F9, OPPO Find series, or other OPPO models. The BLP661 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 BLP661 3400mAh battery replacement is compatible with OPPO A3 and OPPO F7 (models PADM00 and CPH1819). If you need a BLP661 battery for OPPO A3 or a BLP661 battery for OPPO F7 CPH1819, this replacement battery is the exact match. The BLP661 3400mAh OPPO battery is the correct replacement for both devices. For BLP661 battery compatibility, please verify your battery model printed on the original unit — BLP661 is the correct model for these devices. This battery is NOT compatible with OPPO A3s, OPPO A5 series, OPPO F5, OPPO F9, or other OPPO models. If your current OPPO A3 battery or OPPO F7 PADM00 battery now drains quickly or shuts down unexpectedly, this BLP661 3.85V 3400mAh Li‑ion Polymer battery will restore full endurance and reliability.

The BLP661 3400mAh battery for OPPO A3 and OPPO F7 has a typical capacity of 3400mAh (13.09Wh) and a rated voltage of 3.85V, with a charge limit of 4.4V. This BLP661 3.85V 3400mAh Li‑ion Polymer battery is built with grade A cells and is CE, RoHS, and UN38.3 certified. For BLP661 battery performance, the battery supports the original VOOC fast charging technology. For best BLP661 battery performance OPPO F7 CPH1819, allow 2‑3 full charge cycles after installation to calibrate the battery meter. The BLP661 3400mAh OPPO battery performance provides reliable endurance for daily tasks, social media, and entertainment. If your original OPPO A3 battery now requires more frequent charging instead of lasting through the day, this replacement will restore the full 3400mAh capacity and stable voltage output.

Professional BLP661 battery installation is recommended for OPPO A3 and OPPO F7. These devices have a sealed design with strong adhesive. To replace BLP661 battery in OPPO A3 or replace BLP661 battery in OPPO F7 CPH1819, the technician must heat the back cover to soften adhesive, carefully pry it open to avoid damaging the display or internal components, disconnect the battery's small 2‑pin connector, remove the old battery, and install the new BLP661 battery before resealing. For BLP661 battery installation, improper handling can damage the display or internal components. For BLP661 battery health maintenance and OPPO A3 battery care tips: 1) Use the original OPPO VOOC charger and cable for optimal charging. 2) Keep battery level between 20% and 80% for daily use to maximize the lifespan of the 3400mAh 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 BLP661 battery care tips OPPO F7 PADM00, stop using immediately if the battery shows any swelling.

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