Battery for ASUS A400U A401U L K401L B K401U B U4000 Series 11.4V 38Wh 3300mAh B31N1424 2-Year Warranty

**Product Overview**
This high-performance replacement battery is specifically designed for select ASUS laptop models, including the A400U, A401U, K401L, K401U, and U4000 series. It replaces the original ASUS battery part number B31N1424, delivering the same voltage and capacity as the OEM unit. Whether youre working remotely, studying, or streaming, this battery provides reliable power to keep your device running longer.

**Important Voltage Warning**
Please confirm your original batterys voltage before purchasing. This battery is rated at 11.4V. If your original battery is 7.6V or 14.8V, this unit will NOT be compatible. Using an incorrect voltage battery may cause damage to your laptop or battery. Always check the voltage label on your old battery or consult your device manual.

**Compatible ASUS Laptop Models (including but not limited to): **
- ASUS A400U Series
- ASUS A401U Series
- ASUS K401L Series
- ASUS K401U Series
- ASUS U4000 Series
- ASUS U4000U Series
- ASUS U4000B Series

**Replaces Original ASUS Part Numbers: **
B31N1424, B31N1424-1, B31N1424-2, B31N1424-3, 0B200-02900000, 0B200-02910000

**Specifications: **
- Battery Type: Li-ion (Lithium-ion)
- Voltage: 11.4V
- Capacity: 38Wh / 3300mAh
- Cells: 3-cell
- Color: Black
- Weight: Approx. 200g
- Connector: 6-pin (OEM standard)
- Warranty: 2 Years

**Comparison Table (OEM vs.
This Replacement): **
| Feature | Original ASUS Battery | This Replacement Battery |
|----------------------|-----------------------|-------------------------|
| Voltage | 11.4V | 11.4V (identical) |
| Capacity | 38Wh / 3300mAh | 38Wh / 3300mAh (same) |
| Cell Count | 3 cells | 3 cells (same) |
| Safety Protection | Standard | Enhanced (overcharge, over-discharge, short circuit, overheat) |
| Warranty | 1 year (typical) | 2 years (extended) |
| Price | Higher | Affordable & cost-effective |

**Installation Tips: **

1. Power off your laptop and unplug the AC adapter before replacing the battery.

2. Remove the back cover or battery compartment (depending on your model).

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

4. Remove the old battery and insert the new one, ensuring the connector is fully seated.

5. Secure the battery with screws (if any) and replace the back cover.

6. Charge the battery to 100% before first use for optimal performance.

**Note: ** If your laptop does not recognize the new battery, please
perform a hard reset: disconnect the battery and AC adapter, hold the power button for 15 seconds, then reconnect and restart.

**Package Includes: **
- 1 x Replacement Battery
(with installation guide)

**Customer Support**
We stand behind our product with a 2-year warranty and responsive customer service. If you have any questions about compatibility or installation, feel free to contact us. Your satisfaction is our priority.