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

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

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

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.