Battery ASUS X531 B31N1842 36Wh 3‑cell replacement for ASUS X531 series

Replacement battery for ASUS X531 laptops, model B31N1842, rated 36Wh with a 3‑cell configuration. This compact battery restores portable power to compatible ASUS X531 series notebooks and is designed to fit the original battery compartment and connector layout. It supports everyday laptop tasks such as web browsing, document editing and light multimedia playback while providing a manufacturer‑specified physical fit and standard charging behaviour.

Advantages

The battery offers an original-style form factor and connector compatibility for ASUS X531 series laptops, enabling straightforward installation and stable electrical connection. With a 36Wh capacity and three cells, it balances runtime and weight for typical mobile use. Built to match standard charging profiles, the battery integrates with the laptop's power management to permit normal battery level reporting and charging cycles.

Suitable for

• Replacing a worn or failed battery in ASUS X531 series laptops
• Extending usable runtime for web browsing and office applications
• Maintaining portable use where lightweight, compact power is needed
• OEM-compatible repairs and refurbishments of ASUS X531 notebooks

Key specifications

• Capacity: 36 Wh
• Cell configuration: 3‑cell
• Compatibility: Designed for ASUS X531 series laptops (physical fit and connector alignment)
• Typical use: Supports web browsing, document work and light multimedia
• Form factor: Compact internal laptop battery designed to match original installation

How to use

Power down the laptop and disconnect the external charger before replacing the battery. Remove the laptop’s access panel or bottom cover as required for your specific ASUS X531 model, following manufacturer guidelines to access the internal battery compartment. Disconnect the old battery connector carefully and remove the battery, then position the replacement battery in the compartment and reconnect the battery cable securely. Reassemble the laptop, reconnect the charger and allow the system to detect the new battery; perform an initial charge cycle according to standard laptop battery care practices.

Recommendations

For safe operation, use the replacement battery only in compatible ASUS X531 models, avoid exposing the battery to extreme temperatures or moisture, and follow standard charging and storage recommendations. If uncertain about disassembly, seek professional installation to prevent damage to the laptop or battery.