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BLP711 4000mAh 3.85V Li-Polymer replacement battery for OPPO A1k CPH1923, front view showing battery surface and connector flex cable

BLP711 4000mAh 3.85V Li-Polymer Replacement Battery for OPPO A1k CPH1923 10W Fast Charging

Original price was: $22.99.Current price is: $18.99.

🔘 BLP711 4000mAh 3.85V | 🔋 Li-Polymer | 📱 Compatible with OPPO A1k CPH1923 10W Fast Charging

8 in stock

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SKU: BLP711 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

✅ 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: BLP711
Capacity: 4000mAh (Typical) / 15.4Wh
Rated voltage: 3.85V
Charge limit voltage: 4.4V
Battery type: Li-Polymer
Compatible with: OPPO A1k (CPH1923), OPPO 1923, Realme C2
Replaces OEM part number: BLP711
Package include: 1 x battery
Restore the battery life of your OPPO A1k with this BLP711 4000mAh replacement battery. The OPPO A1k (model CPH1923) was launched in April 2019, featuring a 6.1-inch HD+ waterdrop display, MediaTek Helio P22 processor, 2GB RAM, and 32GB storage — all packed with a robust 4000mAh battery that the company claims can last up to 17 hours of daily usage[reference:0]. This Li-Polymer battery delivers the factory-rated 4000mAh capacity for reliable all-day usage.
Built with high-quality 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. The OPPO A1k supports 10W fast charging — the device comes with a 10W charger in the box, providing twice the charging speed compared to a standard 5W charger[reference:1]. For reference, third‑party retailers sell this battery for approximately $20 to $32.
Compatibility Note: Please power down your device and check your original battery label before ordering. Ensure the model number printed matches BLP711. This battery is compatible with OPPO A1k (CPH1923) and Realme C2. Professional installation is recommended as the phone has a sealed back cover with strong adhesive. The phone is not water resistant, so water seal maintenance is not a 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 10W charging performance, use the original charger that came with your phone. If you don’t use the battery 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 BLP711 battery for OPPO A1k is compatible with OPPO A1k (model CPH1923, also known as OPPO 1923) and Realme C2. The OPPO A1k was launched in April 2019 featuring a 6.1-inch HD+ waterdrop display, MediaTek Helio P22 processor, 2GB RAM, and 32GB storage. This 4000mAh battery for OPPO A1k CPH1923 is a direct replacement for the original BLP711 battery. If your OPPO A1k 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 BLP711 printed on your existing battery before purchasing.

The BLP711 4000mAh 3.85V battery has a typical capacity of 4000mAh (15.4Wh) and a rated voltage of 3.85V. Charge limit voltage is 4.4V. It is a Li-Polymer battery built with Grade A cells and is CE, RoHS, and UN38.3 certified. The OPPO A1k supports 10W fast charging via micro-USB — according to OPPO, the device “comes with 10W charger which provides twice fast charging compared to 5W standard fast charger”[reference:2]. For best results, always use the original charger that came with your phone.

Professional installation is strongly recommended for OPPO A1k battery replacement. The OPPO A1k has a sealed design with a plastic back cover secured by strong adhesive. The process to replace BLP711 battery in OPPO A1k requires heating to soften adhesive and careful prying to avoid damaging the display or back cover. The phone has no official IP water resistance rating, so water seal maintenance is not a 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), use plastic tools to avoid damaging internal components, and never reuse a battery after removal. Third-party repair shops typically charge $15-30 for labor.

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