Battery for ASUS K3502Z K3402Z X1403 M3402R M3502R C31N2105 15.4V 5000mAh 77Wh, High Capacity, 12-Month Warranty

**Product Overview**
This high-performance replacement battery is specifically designed for select ASUS laptop models, including the K3502Z, K3402Z, X1403, M3402R, and M3502R series. It is a direct replacement for the original ASUS C31N2105 battery, offering the same voltage and capacity specifications for seamless compatibility.

**Important Voltage Warning**
Please verify that your original battery is rated at ** 15.4V ** before purchasing. Using an incorrect voltage battery may damage your laptop or cause safety issues. This battery is NOT compatible with 11.4V or 14.8V models.

**Compatible Models & Part Numbers**
- Compatible Laptop Models:
ASUS K3502Z, K3402Z, X1403, M3402R, M3502R, and related variants (e. g., K3502ZA, K3402ZA, X1403ZA, M3402RA, M3502RA).
- Replaces Original Part Number:
C31N2105

**Specifications**
| Parameter | Value |
|-----------|-------|
| Voltage | 15.4V |
| Capacity | 5000mAh / 77Wh |
| Cell Type | Lithium-ion |
| Color | Black |
| Warranty | 12 Months |

**Comparison Table**
| Feature | This Battery | Generic Low-Cost Battery |
|---------|--------------|--------------------------|
| Capacity | 5000mAh / 77Wh | Often 4000mAh or less |
| Safety Certifications | Overcharge/Discharge/Short-circuit protection | May lack full protection |
| Compatibility | Tested for K3502Z/K3402Z/X1403/M3402R/M3502R | May not fit precisely |
| Warranty | 12 Months | Usually 6 months or none |

**Installation Tips**
1. Power off your laptop and disconnect the AC adapter.
2. Remove the bottom panel screws (refer to your laptops service manual if needed).
3. Disconnect the old battery cable and gently remove the battery.
4. Connect the new battery cable, insert the battery, and secure the panel.
5. Charge the battery fully before first use for optimal performance.

**Package Includes**
- 1x Replacement Battery
- (if applicable)

**Note**
This is a compatible replacement product, not an original ASUS accessory. It is manufactured to meet or exceed OEM specifications. Please ensure your laptop model and original battery part number match the list above before ordering.