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S86 4000mAh 3.85V Li-ion Polymer replacement battery for Oukitel WP12 Pro rugged smartphone, front view showing battery surface and small 2-pin connector
S86 4000mAh 3.85V replacement battery for Oukitel WP12 Pro, back view showing model number S86, capacity 4000mAh, and voltage 3.85V on spec label

S86 4000mAh 3.85V Battery for Oukitel WP12 Pro Replacement

Original price was: $29.99.Current price is: $23.99.

🔘 S86 4000mAh 3.85V | 🔋 Li-ion Polymer | 📱 For Oukitel WP12 Pro Rugged Phone

8 in stock

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SKU: WP12 Pro 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 Oukitel WP12 Pro

✅ 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: S86
Capacity: 4000mAh (typical) / 15.4Wh
Rated voltage: 3.85V
Charge limit voltage: 4.4V
Battery type: Li-ion Polymer (Grade A cells)
Compatible with: Oukitel WP12 Pro
Package include: 1 x battery
Restore the reliable performance of your Oukitel WP12 Pro with this S86 4000mAh replacement battery. The Oukitel WP12 Pro is a rugged smartphone designed for outdoor and industrial use, featuring IP68/IP69K dust and water resistance and a durable build that can withstand harsh environments. It is equipped with a 4000mAh battery that delivers dependable all‑day endurance for demanding tasks. After years of daily charging cycles, the factory battery capacity naturally degrades. This Li‑ion Polymer battery restores the full 4000mAh capacity, bringing back the reliable endurance this rugged device was 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 Rugged Performance: The Oukitel WP12 Pro is built around a 4000mAh battery that delivers solid all‑day endurance for users who work in challenging environments. After extensive use, the original battery capacity degrades significantly. Common symptoms include: the device requiring more frequent charging, unexpected shutdowns at 15‑25% battery remaining, slower charging than when new, or visible battery swelling. This S86 replacement battery restores the factory‑spec 4000mAh capacity and supports the original charging capability. 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 Oukitel WP12 Pro only. Please confirm your battery model before ordering — S86 is printed on your original battery. This battery is NOT compatible with Oukitel WP12 (non‑Pro), Oukitel WP13 Pro, Oukitel WP15, Oukitel WP19, or other Oukitel models. The WP12 Pro uses a distinct 4000mAh battery with 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 S86 4000mAh battery replacement is compatible with Oukitel WP12 Pro only. If you need a S86 battery for Oukitel WP12 Pro or a Oukitel WP12 Pro battery replacement, this S86 4000mAh battery is the exact match. For S86 battery compatibility, please verify your battery model printed on the original unit — S86 is the correct model for this device. This battery is NOT compatible with Oukitel WP12, Oukitel WP13 Pro, Oukitel WP15, Oukitel WP19, or other Oukitel models. If your current Oukitel WP12 Pro battery now drains quickly or shuts down unexpectedly, this S86 3.85V 4000mAh Li‑ion Polymer battery will restore full endurance and reliability.

The S86 4000mAh battery for Oukitel WP12 Pro has a typical capacity of 4000mAh (15.4Wh) and a rated voltage of 3.85V, with a charge limit of 4.4V. This S86 3.85V 4000mAh Li‑ion Polymer battery is built with grade A cells and is CE, RoHS, and UN38.3 certified. For S86 battery performance, the battery supports the original charging capability of the Oukitel WP12 Pro. For best S86 battery performance Oukitel WP12 Pro, allow 2‑3 full charge cycles after installation to calibrate the battery meter. If your original Oukitel WP12 Pro battery now requires more frequent charging instead of lasting as it did when new, this replacement will restore the full 4000mAh capacity and stable voltage output.

Professional S86 battery installation is recommended for Oukitel WP12 Pro. The device has a rugged sealed design with IP68/IP69K dust and water resistance. To replace S86 battery in Oukitel WP12 Pro, the technician must carefully open the device while maintaining the waterproof seals, disconnect the battery's small 2‑pin connector, remove the old battery, and install the new S86 battery before resealing to maintain the device's IP68/IP69K protection. For S86 battery installation, improper handling can compromise the device's water resistance or damage internal components. For S86 battery health maintenance and Oukitel WP12 Pro battery care tips: 1) Use the original charger and cable for optimal charging. 2) Keep battery level between 20% and 80% for daily use to maximize the lifespan of the 4000mAh 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 S86 battery care tips Oukitel WP12 Pro, stop using immediately if the battery shows any swelling.

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