Battery for ASUS Vivobook Pro 15 PX555C/B PX455C P1550C, 11.55V 42Wh B31N1915, High Capacity Li-ion Laptop Battery [Upgraded 2-Year Warranty]

**Product Description**
Upgrade your ASUS Vivobook Pro 15 with this high-performance replacement battery, designed specifically for PX555C, PX555B, PX455C, and P1550C models. Whether your original battery no longer holds a charge, swells, or drains quickly, this B31N1915 compatible battery restores your laptops mobility and productivity.

** Important Voltage Warning**
Please confirm your original battery voltage is ** 11.55V ** before purchasing. Using an incorrect voltage may cause system instability or damage. This battery is NOT compatible with 7.6V, 14.4V, or 15.2V models. Check your battery label or system report to verify.

**Compatible Laptop Models**
- ASUS Vivobook Pro 15 PX555C / PX555B
- ASUS Vivobook Pro 15 PX455C
- ASUS Vivobook Pro 15 P1550C
- Also fits other ASUS models using B31N1915 battery (please verify physical dimensions)

**Replaces Original Battery Part Numbers**
B31N1915, B31N1915-1, B31N1915-2, B31N1915-3

**Specifications**
- Battery Type: Li-ion
- Voltage: 11.55V
- Capacity: 42Wh / 3640mAh
- Cell Count: 3 cells
- Color: Black
- Weight: Approx. 220g
- Dimensions: 270 x 50 x 20 mm (please measure your old battery to confirm fit)

**Comparison Table**

| Feature | Our Battery | Generic Battery |
|---------|-------------|----------------|
| Voltage | 11.55V (exact match) | May vary, risk of incompatibility |
| Capacity | 42Wh (original spec) | Often lower capacity |
| Protection IC | Overcharge/over-discharge/short circuit | Basic or none |
| Warranty | 2 years | Usually 6-12 months |
| Compatibility | Tested for PX555C/PX455C/P1550C | May not fit all listed models |

**Installation Tips**

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

2. Remove the back cover screws (refer to your laptops service manual).

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

4. Insert the new battery, connect the cable, and secure the cover.

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

6. If the battery is not recognized, check the connector alignment and restart the laptop.

**Package Includes**
- 1 x Replacement Battery

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**Note**
This is a third-party compatible product, not manufactured by ASUS. All brand names and logos are trademarks of their respective owners. Please recycle your old battery responsibly.