Laptop Battery for ASUS TP550LA TP550LD R554L C21N1333, 11.4V 44Wh, High Capacity, 1-Year Warranty

**Product Description**
This high-performance replacement battery is designed specifically for ASUS TP550LA, TP550LD, R554L series laptops. It uses premium-grade lithium-ion cells to deliver reliable power, matching the original C21N1333 battery specifications. Whether you need to replace an aging battery or keep a spare for travel, this battery ensures your laptop runs smoothly without unexpected shutdowns.

**Important Voltage Warning**
Please verify your original battery voltage before purchasing. This battery is 11.4V. If your original battery voltage is 10.8V or 11.1V, it is NOT compatible. Using an incorrect voltage battery may damage your device or cause safety hazards. Always check the voltage label on your old battery.

**Compatible Laptop Models (including but not limited to) **
- ASUS TP550LA series (TP550LA-XX, TP550LA-DS, etc. )
- ASUS TP550LD series (TP550LD-XX, TP550LD-DS, etc. )
- ASUS R554L series (R554L-XX, R554L-DS, etc. )
- Other ASUS models using C21N1333 battery

**Compatible Original Battery Part Numbers**
- C21N1333
- C21N1333-1
- C21N1333-2

**Specifications Table**

| Specification | Value |
|---------------|-------|
| Voltage | 11.4V |
| Capacity | 44Wh / 3900mAh |
| Cell Type | Lithium-ion |
| Color | Black |
| Weight | Approx. 250g |
| Warranty | 12 months |

**Comparison Table: Our Battery vs. Original**

| Feature | Our Battery | Original ASUS Battery |
|---------|-------------|----------------------|
| Voltage | 11.4V | 11.4V |
| Capacity | 44Wh | 44Wh |
| Safety Protection | Overcharge, over-discharge, short circuit, overheat | Same |
| Warranty | 12 months | Typically 6-12 months |
| Price | Affordable | Higher |

**Installation Tips**
1. Turn off your laptop and unplug the AC adapter.
2. Remove the battery compartment cover (if applicable) or flip the laptop to access the battery.
3. Slide the battery release latch and gently lift the old battery out.
4. Insert the new battery into the slot until it clicks securely.
5. Replace the cover and plug in the charger. Charge the battery fully before first use.

**Safety & Quality**
- Built-in protection circuit prevents overcharging, over-discharging, overheating, and short circuits.
- Manufactured in an ISO-certified facility with strict quality control.
- Meets CE, FCC, and RoHS standards for safety and environmental compliance.

**Package Includes**
- 1 x Replacement Battery (C21N1333 compatible)


**Note**
This is a compatible replacement battery, not an original ASUS product. However, it is designed to meet or exceed the performance of the original. If you have any questions about compatibility, please contact us with your laptop model and original battery part number before purchasing.