New Laptop Battery for ASUS FL8000U A580U B V587U X542U R542U C21N1634 - 11.55V 38Wh 3300mAh - High Capacity, 2-Year Warranty

**Product
Description: **
Upgrade your ASUS laptop with this high-quality replacement battery, specifically designed for the FL8000U, A580U, A580B, V587U, X542U, and R542U series. With a voltage of 11.55V and a capacity of 3300mAh (38Wh), this battery provides the same reliable performance as the original, allowing you to work, study, or stream for hours without interruption.

**Important Voltage Warning: **
Please check your original batterys voltage before purchasing. This battery is 11.55V. It is NOT compatible with 14.4V or 14.8V models. Using an incorrect voltage battery can damage your laptop. If your original battery is 11.55V, this is the perfect match.

**Compatible Laptop Models (including but not limited to): **
- ASUS FL8000U Series (FL8000UF, FL8000UN, etc. )
- ASUS A580U Series (A580UA, A580UB, etc. )
- ASUS A580B Series
- ASUS V587U Series (V587UB, V587UN, etc. )
- ASUS X542U Series (X542UA, X542UN, etc. )
- ASUS R542U Series (R542UA, R542UN, etc. )
- Also compatible with ASUS X542B, X542FA, X542UF, X542URR, and other models using C21N1634 battery.

**Replacement Part Numbers: **
C21N1634, C21N1634-1, C21N1634-2, C21N1634-3

**Specifications: **
- Battery Type: Li-ion
- Voltage: 11.55V
- Capacity: 3300mAh / 38Wh
- Color: Black
- Cell Quality: Grade A+
- Certification: CE, FCC, RoHS

**Comparison Table: **

| Feature | Our Battery | Generic Low-Quality Battery |
|: --- |: --- |: --- |
| Cell Grade | Grade A+ (High capacity & long life) | Grade B or C (Lower capacity, faster degradation) |
| Safety Protections | Overcharge, over-discharge, short circuit, overheat | Basic or no protection |
| Warranty | 2 Years | 6 months or less |
| Compatibility | Exact fit for listed ASUS models | May have loose fit or incorrect connector |

**Installation Tips: **

1. Power off your laptop and unplug the AC adapter.

2. Remove the back cover (if your model has a removable battery, simply slide the release latch).

3. Disconnect the old battery cable and remove the battery.

4. Connect the new battery cable and secure it in place.

5. Replace the back cover and power on your laptop.

6. For best performance, fully charge the battery before first use.

**Note: **
- Do not disassemble, puncture, or expose the battery to high temperatures.
- If the battery is not used for a long time, store it in a cool, dry place at about 50% charge.
- Please recycle old batteries according to local regulations.

**Package Includes: **
1 x 11.55V 3300mAh Laptop Battery


**Customer Satisfaction Guarantee: **
We are confident in the quality of our battery. If you have any questions or concerns, please contact us immediately. We offer a 30-day money-back guarantee and a 2-year warranty for your peace of mind.