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S77 4000mAh 3.85V Li-ion Replacement Battery for OUKITEL C18 Pro Mobile Phone

Original price was: $28.99.Current price is: $22.99.

🔘 S77 4000mAh 3.85V | 🔋 Li-ion | 📱 For OUKITEL C18 Pro

8 in stock

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SKU: S77 Category: Tags: , , ,

Description

Battery model: S77
Capacity: 4000mAh / 15.4Wh
Rated voltage: 3.85V
Charge limit voltage: 4.45V
Battery type: Li-ion
Compatible with: OUKITEL C18 Pro
Package include: 1 x battery
Restore the battery life of your OUKITEL C18 Pro with this S77 4000mAh replacement battery. The OUKITEL C18 Pro is a feature-packed smartphone designed for reliable daily use. This Li-ion battery delivers the factory-rated 4000mAh capacity for all-day calls, messaging, and apps. Built with grade A cells and multi-layer safety protection against overcharge, over-discharge, and short circuits. CE, RoHS, and UN38.3 certified. Provides 300-500 charge cycles under normal use.
Compatibility Note: Fits OUKITEL C18 Pro only. For reference, European retailers sell this battery for €19.88-34 ($21.50-37) depending on the seller. Professional installation is recommended as the phone has a sealed design. Always check your original battery model before purchasing — S77 printed on your existing battery.
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 lifespan, use a certified charger. If you notice swelling or overheating, stop use immediately.

Condition: Brand New – Never used, factory-tested quality

4000mAh High Capacity – All-day 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.

✅ 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 Period 90 days from delivery 15-30 days from order confirmation
When It Starts 📦 Upon delivery ⚠️ Upon order confirmation (even before you receive it)
Claims Handling We do it directly — email us Automated dispute system, seller dependent
After Window Expires Still can contact us for support No 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; actual delivery may be affected by customs, weather, or other unforeseen circumstances.

Destination Freight (USD) Est. Delivery Time
United States $7.80 8-20 days
Canada $6.80 18-45 days
Mexico $10.00 30-60 days
Germany, France, United Kingdom, Greece $6.50 18-45 days
Ireland, Austria, Belgium, Poland, Denmark, Switzerland, Portugal, Norway, Slovakia, Spain, Hungary, Italy, Czech Republic, Luxembourg, Netherlands, Sweden, Cyprus $8.00 18-45 days
Croatia, Finland, Lithuania, Latvia, Slovenia $8.00 30-60 days
Romania $14.00 30-60 days
South Korea, Japan, Australia, New Zealand, Israel, Malaysia, Singapore, Thailand, Philippines, Kazakhstan $7.50 18-45 days
United Arab Emirates, Saudi Arabia, Vietnam, Chile, Peru, Colombia, Brazil $18.00 25-60 days

* Delivery times are estimates; actual delivery may be affected by customs or other factors. If your country is not listed, we are currently unable to ship batteries to that destination.

🇧🇷 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.

🔋 Can't find your battery model? Use our FREE Battery Lookup Service – tell us your device and we'll find a match within 24 hours. 👉 battery.qingsm.tech/find-my-battery

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Frequently Asked Questions

The S77 battery is compatible with OUKITEL C18 Pro only. The C18 Pro is a smartphone from OUKITEL featuring a large battery capacity. If your C18 Pro battery drains quickly or won't hold a charge, this is the correct replacement. For reference, European retailers sell this battery for €19.88-34 ($21.50-37) depending on the seller. German retailer akkucelle.com offers this battery for €19.88 ($21.50), while French tousbatterie.com lists it for €31.50 ($34). Please check your original battery model before purchasing — S77 printed on your existing battery.

The S77 battery has a capacity of 4000mAh (15.4Wh) and a rated voltage of 3.85V. Charge limit voltage is 4.45V. It is a Li-ion battery built with grade A cells and is CE, RoHS, and UN38.3 certified. This replacement matches the factory specifications for OUKITEL C18 Pro. Provides 300-500 charge cycles under normal use.

Professional installation is strongly recommended. The OUKITEL C18 Pro has a sealed design with strong adhesive. Replacing the battery requires heating to soften adhesive and careful prying to avoid damaging the display. If you choose to DIY, watch a full teardown tutorial before starting, use a heat gun at low temperature (no more than 70°C), and never reuse a battery after removal. Third-party repair shops typically charge $15-30 for labor. European sellers like akkucelle.com offer this battery with 12-month warranty for €19.88.

✅ Ready to order?

This battery is in stock and ready to ship within 3-7 days. 90-day warranty included.

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