Description
Product Overview
This ASUS C21N1903 33Wh replacement battery is designed to restore your laptop’s mobility and performance. Manufactured to meet original specifications, it delivers reliable power for compatible ASUS laptop models.
Specifications
- Battery Type: Lithium-ion
- Capacity: 33Wh
- Voltage: 14.8V
- Condition: Brand new
- Compatibility: See detailed lists below
Compatibility Information
Part Numbers (P/N)
- C21N1903
- 0B200-03560000
- C21PoJ1
Compatible Models
- ASUS B3302CEA
- ASUS B3302FEA
- ASUS ExpertBook B5 Flip B5302FEA
- ASUS ExpertBook B9 9400CEA
- ASUS ExpertBook B9 B9400CBA
- ASUS ExpertBook B9 B9400CEA
- ASUS ExpertBook B9 B9450FA
Note: This list represents common compatible models. If your specific model or part number isn’t listed, please leave your laptop model or battery part number in the order notes during checkout, and we’ll verify compatibility before shipping.
When to Replace Your Battery
Consider replacing your laptop battery if you notice any of these common signs of battery degradation:
| Symptom | Description | Recommended Action |
|---|---|---|
| Short Battery Life | Battery drains significantly faster than original capacity, lasting less than 2 hours with normal use | Replace battery |
| Swelling/Bulging | Battery case appears swollen or distorted, may cause trackpad/keyboard lifting | Replace immediately for safety |
| Failure to Charge | Battery won’t charge beyond certain percentage or doesn’t charge at all | Replace battery |
| Random Shutdowns | Laptop shuts down unexpectedly even with remaining charge indicated | Replace battery |
| Age Over 2 Years | Most lithium-ion batteries show significant degradation after 2-3 years of regular use | Consider replacement |
| OS Battery Warnings | Windows or other operating systems indicate “Consider replacing your battery” | Replace battery |
Expected Battery Life
Based on 33Wh capacity with typical ASUS ExpertBook usage patterns (estimated conservative values):
| Usage Scenario | Estimated Runtime | Notes |
|---|---|---|
| Web Browsing | 3-4 hours | Multiple tabs, Wi-Fi enabled |
| Document Editing | 4-5 hours | Word processing, spreadsheets |
| Video Streaming | 2.5-3.5 hours | 1080p video, medium brightness |
| Light Productivity | 4-6 hours | Email, basic office applications |
| Standby/Sleep | 40-60 hours | With occasional wake-ups |
Important Note: These estimates are for new batteries in used systems. Actual runtime may be shorter than when your laptop was new due to increased software demands, background processes, and natural hardware aging. Battery life varies based on usage patterns, settings, and system configuration.
Purchase Assurance
- Same day shipping on orders placed before 2PM
- 30-day money-back guarantee
- 1-year manufacturer warranty
- In stock, ready to ship
- Brand new product
- Free shipping included
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