Description
Product Overview
This ASUS C21-X402 38Wh replacement battery is designed to restore your laptop’s mobility and performance. Manufactured to meet original specifications, it ensures reliable power delivery for compatible ASUS models.
Specifications
- Battery Capacity: 38Wh
- Part Number: C21-X402
- Chemistry: Lithium-ion
- Condition: Brand new
Compatibility Information
Compatible Part Numbers (P/N)
- 0B200-00300700
- 0B200-00300800
Compatible Models
- VivoBook X402
- VivoBook X402C
- VivoBook X402CA
- VivoBook S400
- VivoBook S400C
- VivoBook S400CA
- X402CA
Note: This list represents common compatible models. If your specific model isn’t listed, please leave your laptop model or current battery part number in the order notes during checkout, and we’ll verify compatibility before shipping.
When to Consider Battery Replacement
| Situation | Description |
|---|---|
| Short Runtime | Battery drains significantly faster than original capacity, lasting less than 1-2 hours under normal use |
| Swelling/Bulging | Battery case appears swollen or causes trackpad/keyboard lifting |
| Charging Issues | Battery won’t charge fully, charges intermittently, or requires specific positioning |
| Unexpected Shutdowns | Laptop turns off suddenly even when battery indicator shows remaining charge |
| OS Warnings | System displays “Replace Battery” or “Battery Health Critical” messages |
| Age Factor | Original battery is 2-3+ years old with noticeable performance decline |
Estimated Battery Life by Usage
| Usage Scenario | Estimated Runtime |
|---|---|
| Web Browsing & Email | 3-4 hours |
| Document Editing | 4-5 hours |
| Video Streaming | 2-3 hours |
| Gaming | 1-2 hours |
| Mixed Use | 3-4 hours |
Note: These are conservative estimates for a new battery in older hardware. Actual runtime may be shorter than original performance due to increased software demands and natural hardware aging.
Purchase Benefits
- Same-day shipping on business days
- 30-day money-back guarantee
- 1-year manufacturer warranty
- In stock, ready to ship
- Brand new product
- Free shipping included
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