Mobik B31N1912 Laptop Battery for ASUS VivoBook 11.55V 42Wh

Mobik B31N1912 is a direct replacement Li-ion laptop battery designed to restore run time for compatible ASUS VivoBook 14 and 15 models at 11.55V and 42Wh.

When an original laptop battery no longer holds charge or the system reports degraded capacity, a compatible replacement can bring back usable portability without replacing the whole notebook. The Mobik B31N1912 / C31N1912 battery is built to match OEM voltages and dimensions for many ASUS VivoBook E410, L410, F414, E510 and L510 variants, using grade A cells and safety certifications to meet everyday power needs.

Which ASUS models will this Mobik battery work in?

Mobik designed this pack to match the form factor and electrical specifications of several VivoBook series. Confirm your laptop’s original part number or compare battery voltage and mounting points before ordering.

• Compatible model numbers: B31N1912, C31N1912, 0B200-03680000, 0B200-03680100.
• Common laptop models: VivoBook 14 E410, E410M, E410MA (and EK variants), L410 series, F414MA, E510 series, L510 series, and R522MA where applicable.
• Check laptop model sticker or original battery label for matching part numbers to ensure fit.

How does the battery perform and what are the technical specs?

This replacement is specified at 11.55 volts and 42Wh (3,550mAh) using three Li-ion cells. Mobik uses grade A cells rated for up to about 500 charge cycles under normal conditions, and the pack integrates standard protections for safer daily use.

• Voltage: 11.55V — matches OEM voltage requirement.
• Capacity: 42Wh / 3550mAh — restores typical runtime for targeted models.
• Cell count: 3-cell Li-ion configuration for compact ultrabooks.
• Safety: UL, CE, FCC, RoHS certifications with built-in protection against short circuit, overheating, and overcurrent.

What installation tips and troubleshooting steps should I follow?

Installing a replacement battery is straightforward but requires care: power down the laptop, disconnect AC, remove the back cover and old battery, then install the new pack using the supplied screwdrivers. If the battery isn’t detected right away, a few simple steps usually resolve the issue.

• Ensure connectors are seated fully and screws secure the battery in place.
• If not recognized, reinstall and verify the interface is clean and aligned.
• To wake a new battery: discharge to about 5% (avoid full 0%), then charge and cycle 3–4 times.
• Keep BIOS and power management drivers updated for optimal compatibility.

What support and warranty-related questions should I expect?

Mobik provides customer-first support with email assistance and supplies screwdrivers for installation. Be aware of seller return windows on some marketplaces and contact Mobik promptly if you encounter any issues so they can help troubleshoot or arrange a replacement.

• 24/7 email support for product questions and installation help.
• Comes with installation tools (screwdrivers) to ease replacement.
• Follow marketplace return timelines; contact the seller via your order page for help.

Who this pack is for: This Mobik B31N1912 replacement battery is intended for users with compatible ASUS VivoBook 14/15 models seeking an affordable way to restore portable battery life without sacrificing safety or fit. It’s suitable for students, professionals, and anyone who needs a direct-fit, certified replacement battery that matches OEM electrical specifications. If you’re uncertain about fit, verify the original battery part number and compare dimensions before purchasing.