TREE.NB B31N1912 Laptop Battery for ASUS VivoBook 14

The TREE.NB B31N1912 is a direct-fit 11.55V, 42Wh lithium-ion replacement battery designed to restore run-time and reliability to compatible ASUS VivoBook 14 and related models.

If your VivoBook’s runtime has dropped or the original battery no longer charges properly, this replacement cell provides the same voltage and capacity as the factory unit so your laptop can return to daily use. The battery is manufactured with safety certifications and matches several OEM part numbers, making it a straightforward swap for many E410, L410, F414, E510 and L510 series machines.

Will this battery fit my specific VivoBook model?

Yes — the TREE.NB B31N1912 is produced to match the mounting points and electrical specifications of many ASUS VivoBook 14 and smaller VivoBook models. Confirm the part number and physical shape against your original battery before purchasing.

• Compatible part numbers include B31N1912 and related OEM codes (e.g., 0B200-03680000).
• Designed for models such as E410M/E410MA, L410M/L410MA, F414MA, E510MA/E510KA, L510MA, and R522MA.
• Check your laptop service label or remove the old battery to verify connector orientation and screw locations.

How long will the replacement battery last on a single charge?

Run-time depends on your workload, brightness, and background apps, but the 42Wh (3550mAh) capacity restores typical lightweight use to levels similar to the original battery. Expect several hours for web browsing and document work; heavier tasks will draw power faster.

• Capacity: 42Wh / 3550mAh and nominal voltage 11.55V for consistent power delivery.
• Best for everyday productivity like browsing, streaming, and office apps.
• Actual runtime varies by settings, age of laptop components, and background processes.

Is installation difficult and what should I do if the laptop doesn't recognize it?

Installation is a simple internal swap if you are comfortable opening the laptop case and disconnecting the old pack. If the system doesn’t immediately detect the new battery, follow the recommended initialization steps to ensure the battery wakes up properly.

• Power down, remove the bottom cover, detach the old battery cable, and install the new battery in the same orientation.
• If not recognized, reseat the connector and repeat installation to confirm full contact.
• Discharge to about 10–20% (avoid 0%), then fully charge and cycle 3–4 times for optimal calibration.

What safety and quality assurances come with this battery?

The TREE.NB replacement battery is manufactured under safety standards and carries CE and UL certifications to meet common regulatory requirements. It’s designed to match environmental and safety expectations for consumer laptop batteries.

• Certified CE and UL for electrical and environmental safety.
• Built with Li-ion cells and designed to meet compatibility and quality checks.
• Follow disposal and recycling guidance for Lithium-ion batteries in your area.

Who is this for: This battery is aimed at VivoBook owners and service technicians who need a reliable, OEM-compatible replacement to restore mobility and runtime. It’s a practical choice for students, professionals, and anyone who prefers to replace the internal battery rather than buy a new laptop, provided they verify model compatibility before purchase.