Battery for ASUS VivoBook (MITSU) model BC/AS-A512-2 4150 mAh 7.6V Li-ion

MITSU replacement battery BC/AS-A512-2 is designed for ASUS VivoBook 15 series laptops and provides a rated capacity of 4150 mAh with a nominal voltage of 7.6V (compatible with systems using 7.4V). This rechargeable Li‑ion pack restores portable power for models in the VivoBook A512, R512 and X512 families and is intended as a direct replacement to return usable runtime and mobility to compatible notebooks.

Advantages

The battery offers a factory-specified 4150 mAh capacity and standard Li‑ion chemistry for a balance of energy density and reliability. With the nominal 7.6V rating it is suitable for systems expecting 7.4V, ensuring electrical compatibility while maintaining stable discharge characteristics. The replacement pack is compact and matches the form factor of the original module to fit existing battery compartments and connectors on supported VivoBook models.

Suitable for

• Replacing a worn or failing battery in ASUS VivoBook 15 A512, R512 and X512 series laptops
• Restoring laptop portability for mobile work, study or travel
• Carrying as a spare battery for extended use away from power outlets

When it may not be suitable

This battery is intended specifically for compatible VivoBook 15 models; it may not be mechanically or electrically compatible with other ASUS families or laptop brands. Systems that require a different voltage, connector type, or a higher-capacity factory battery should not use this pack. Also, if your battery issue is related to motherboard charging circuitry rather than the pack itself, replacing the battery alone may not resolve the problem.

Key specifications

• Chemistry: Lithium‑ion (Li‑ion)
• Capacity: 4150 mAh (approx. 32 Wh)
• Nominal voltage: 7.6V (compatible with 7.4V systems)
• Intended fit: ASUS VivoBook 15 A512 / R512 / X512 series
• Function: Rechargeable laptop battery pack

How to use

Power the laptop off and disconnect any external power source before replacing the battery. Remove the laptop’s back cover according to the device manufacturer’s instructions, disconnect the old battery from the connector, and replace it with the MITSU BC/AS-A512-2 pack ensuring the connector and mounting points align. Reattach the cover and reconnect the AC adapter. Allow the battery to charge fully before first use to help the system calibrate reported battery levels.

What to consider before purchase

• Confirm your laptop model is one of the supported VivoBook 15 A512, R512 or X512 variants.
• Verify the physical connector and battery form factor match your original module.
• Ensure that the nominal voltage and capacity meet your usage needs and system requirements.

Usage recommendations

For reliable operation, use the original AC adapter and keep charging contacts clean. Avoid exposing the battery to extreme temperatures or moisture. If you experience charging faults after installation, check the connector seating and test with the original battery if available; if faults persist, have the laptop’s power circuitry inspected by a qualified technician.