---
product_id: 126782706
title: "SUNNEAR Replacement Laptop Battery 11.1V 4000mAh 44Wh C31-X402 for ASUS S300 S300C S300CA Series,X402 X402C X402CA Series, S400 S400C S400CA S400E Series Notebook"
brand: "sunnear"
price: "FREE"
currency: VND
in_stock: false
category: "Electronics"
url: https://www.desertcart.vn/products/126782706-sunnear-replacement-laptop-battery-11-1v-4000mah-44wh-c31-x402
store_origin: VN
region: Vietnam
---

# SUNNEAR Replacement Laptop Battery 11.1V 4000mAh 44Wh C31-X402 for ASUS S300 S300C S300CA Series,X402 X402C X402CA Series, S400 S400C S400CA S400E Series Notebook

**Brand:** sunnear
**Price:** FREE
**Availability:** ❌ Out of Stock

## Quick Answers

- **What is this?** SUNNEAR Replacement Laptop Battery 11.1V 4000mAh 44Wh C31-X402 for ASUS S300 S300C S300CA Series,X402 X402C X402CA Series, S400 S400C S400CA S400E Series Notebook by sunnear
- **How much does it cost?** FREE with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/126782706-sunnear-replacement-laptop-battery-11-1v-4000mah-44wh-c31-x402)

## Best For

- sunnear enthusiasts

## Why This Product

- Trusted sunnear brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

*About SUNNEAR: SUNNEAR focus on laptop batteries, To each of our customers with high quality laptop battery, the satisfaction from customer is our forever target. We have a professional Team,Focus our major and Value every client. Thanks for your purchase! *Specification: *Voltage: 11.1V. *Capacity: 44Wh/4000mAh. *Compatible Part Number: C31-X402  *Fit for:(Use &quot;Ctrl&quot; + &quot;F&quot; to find your models quickly) ASUS S300 Series ASUS S300C Series ASUS S300CA Series ASUS VivoBook S300 Series ASUS VivoBook S300C Series ASUS VivoBook S300CA Series ASUS X402 Series ASUS X402C Series ASUS X402CA Series ASUS S400 Series ASUS S400C Series ASUS S400CA Series ASUS S400E Series ASUS VivoBook S400 Series ASUS VivoBook S400C Series ASUS VivoBook S400CA Series ASUS VivoBook S400E Series  *Package Included :1x C31-X402 battery. *Skills to use battery: For the new battery , we suggest that all of our customer should fully charge it with AC power adapter ,and this process takes a long period, the capacity might have been drained by inner PCB circuit, in order to protect your battery life,you should fully charge the battery to 100% and drain it to 1% 2 times, then the capacity will recover.Charge the battery regularly, at least once a month.

## Features

- Model: C31-X402; Voltage: 11.1V; Capacity: 4000mAh/44Wh ; Color: Black.
- Compatible Part Number: C31-X402 .
- Fits Model: ASUS S300 S300C S300CA Series,VivoBook S300 S300C S300CA Series,X402 X402C X402CA Series,S400 S400C S400CA S400E Series, VivoBook S400 S400C S400CA S400E Series Notebook.
- Support: If any question,you can contact us,we will respond within 24 hours via emails,we will help you resolve it before you leave a negative feedback or low review. Thanks for your kind support.
- Warranty: Free exchange/refund within 6 months. You can keep the order before we resend a new one and we will email a prepaid return label to help you return the order.

## Images

![SUNNEAR Replacement Laptop Battery 11.1V 4000mAh 44Wh C31-X402 for ASUS S300 S300C S300CA Series,X402 X402C X402CA Series, S400 S400C S400CA S400E Series Notebook - Image 1](https://m.media-amazon.com/images/I/41wxlmZ0ZhL.jpg)
![SUNNEAR Replacement Laptop Battery 11.1V 4000mAh 44Wh C31-X402 for ASUS S300 S300C S300CA Series,X402 X402C X402CA Series, S400 S400C S400CA S400E Series Notebook - Image 2](https://m.media-amazon.com/images/I/51lUKWbG-nL.jpg)
![SUNNEAR Replacement Laptop Battery 11.1V 4000mAh 44Wh C31-X402 for ASUS S300 S300C S300CA Series,X402 X402C X402CA Series, S400 S400C S400CA S400E Series Notebook - Image 3](https://m.media-amazon.com/images/I/418rVNx3u9L.jpg)
![SUNNEAR Replacement Laptop Battery 11.1V 4000mAh 44Wh C31-X402 for ASUS S300 S300C S300CA Series,X402 X402C X402CA Series, S400 S400C S400CA S400E Series Notebook - Image 4](https://m.media-amazon.com/images/I/31fkAEIjF3L.jpg)
![SUNNEAR Replacement Laptop Battery 11.1V 4000mAh 44Wh C31-X402 for ASUS S300 S300C S300CA Series,X402 X402C X402CA Series, S400 S400C S400CA S400E Series Notebook - Image 5](https://m.media-amazon.com/images/I/41bf213gjCL.jpg)

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-02-19*