Laptop Battery for ASUS C21N1335, Compatible with R451L S451L S451LA V451L V451LB V451LN Series, 11.4V 44Wh, High Capacity, CE/RoHS Certified, 12-Month Warranty

**Product Overview**
Upgrade or replace your worn-out ASUS laptop battery with this premium 11.4V 44Wh replacement, specifically designed for the C21N1335 series. Whether youre a student, professional, or home user, this battery restores your laptops original runtime and keeps you productive without being tethered to a power outlet.

**Important Voltage Warning**
Please verify that your original battery voltage is 11.4V. Using an incorrect voltage battery may cause damage to your laptop or battery. This replacement is NOT compatible with 7.6V or 14.8V systems. Always check your original battery label before purchasing.

**Compatible Laptop Models (Full List) **
- ASUS R451L Series
- ASUS S451L Series
- ASUS S451LA Series
- ASUS V451L Series
- ASUS V451LB Series
- ASUS V451LN Series
- Also compatible with all sub-models of the above series (e. g., V451LB-XO123D, S451LA-DB51T, etc. )

**Replacement Part Numbers**
- C21N1335

**Specifications Table**
| Parameter | Value |
|-----------|-------|
| Battery Type | Li-ion |
| Voltage | 11.4V |
| Capacity | 44Wh / 3800mAh |
| Cell Count | 4 cells |
| Color | Black |
| Weight | Approx. 250g |
| Certification | CE, RoHS |
| Warranty | 12 Months |

**Comparison Table: Original vs. Replacement**
| Feature | Original ASUS Battery | This Replacement |
|---------|----------------------|------------------|
| Voltage | 11.4V | 11.4V (Exact Match) |
| Capacity | 44Wh | 44Wh (Equal) |
| Safety Protection | Yes | Yes (Enhanced) |
| Price | High | Affordable |
| Warranty | Limited | 12 Months |

**Installation Tips**
1. Power off your laptop and disconnect the AC adapter.
2. Remove the battery compartment cover (if applicable) or flip the laptop over to access the battery.
3. Slide the battery release latch (s) and gently lift the old battery out.
4. Insert the new battery, ensuring it clicks securely into place.
5. Reattach the cover, connect the charger, and let the battery charge fully before first use.
6. For optimal lifespan, avoid complete discharge; recharge when battery level drops to 20%.

**Why Choose This Battery? **
- 100% brand new, high-quality A-grade cells.
- Rigorously tested for performance, safety, and durability.
- Eco-friendly packaging and materials.
- Fast shipping from local warehouse.

**Package Includes**
- 1 x Replacement Battery for ASUS C21N1335


**Note**
This is a third-party replacement product, not manufactured by ASUS. It is fully compatible and tested to meet or exceed OEM standards. If you have any questions about compatibility, please contact us with your laptop model and original battery part number before ordering.