Laptop Battery for ASUS A31N1519 X540L X540LJ F540U X540SA X540SC, 11.4V 38Wh, Compatible with X540 Series, 1-Year Warranty

**Product Overview**
Upgrade or replace your worn-out laptop battery with this high-performance 11.4V 38Wh replacement battery designed specifically for ASUS X540 series notebooks. Whether you are using an X540L, X540LJ, F540U, X540SA, or X540SC, this battery provides a seamless fit and reliable power to keep you productive on the go.

**Important Voltage Warning**
Please verify your original battery voltage before purchasing. This battery is 11.4V (3-cell series). Using an incorrect voltage battery may cause damage to your laptop or battery. If your original battery is 7.6V or 14.8V, this product is NOT compatible.

**Compatible Models & Part Numbers**
- Part Numbers: A31N1519
- Laptop Models:
ASUS X540L, X540LJ, X540LA, X540LB, X540LP
ASUS F540U, F540UA, F540UV
ASUS X540SA, X540SC, X540S
ASUS X540NA, X540N
ASUS X540YA, X540Y
ASUS X540BR
ASUS X540UP
ASUS X540MA
ASUS X540MB
ASUS X540L Series (all sub-models)
ASUS F540 Series (all sub-models)
ASUS VivoBook F540U, X540U, X540S Series

**Specifications**
- Battery Type: Lithium-ion (Li-ion)
- Voltage: 11.4V
- Capacity: 38Wh (typical)
- Cells: 3-cell
- Color: Black
- Weight: Approx. 220g
- Dimensions: 270 x 50 x 20 mm (approx. )
- Connector: 4-pin

**Comparison Table**

| Feature | This Battery ( 11.4V 38Wh) | Original ASUS Battery | Generic Low-Cost Battery |
|---------|---------------------------|-----------------------|--------------------------|
| Voltage | 11.4V (exact match) | 11.4V | May vary (risk of mismatch) |
| Capacity | 38Wh | 38Wh | Often lower (e. g., 30Wh) |
| Safety Protection | Overcharge/over-discharge/short-circuit | Yes | Often missing |
| Warranty | 1 Year | Varies | Usually 30 days |
| Compatibility | X540/F540 series | X540/F540 series | Limited models |

**Installation Tips**

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

2. Remove the battery compartment cover (if applicable) or unscrew the bottom panel.

3. Gently disconnect the old battery cable from the motherboard.

4. Remove the old battery and insert the new one, aligning the connector properly.

5. Secure the battery with screws and close the cover.

6. Charge the battery fully before first use for optimal performance.

**Package Includes**
- 1 x Replacement Battery
-


**Warranty & Support**
We offer a 1-year warranty against manufacturing defects. If you have any questions about compatibility or installation, please contact us before purchasing. Your satisfaction is our priority.