Fancy Buying B31N1912 Battery for Asus VivoBook 14/15

The Fancy Buying B31N1912 is a direct-replacement 3-cell polymer battery designed to restore power and portability to compatible Asus VivoBook 14/15 models with an 11.55V, 42Wh specification.

If your Asus VivoBook shows reduced run time, refuses to charge fully, or only works while plugged in, this battery is built to bring back reliable mobile performance. It replaces factory part numbers such as B31N1912, C31N1912 and 0B200-03680000 and fits many E410, L410, F414, E510, L510 and R522 series models. The pack ships with a basic installation tool and a user manual to simplify the swap.

Which Asus models will this B31N1912 battery fit?

This battery covers a wide range of Asus VivoBook 14 and 15 variants produced around the same chassis family. Check your existing battery part number or model suffix against the compatibility list before ordering to ensure a match.

• Compatible families: E410, E410M, E410MA, L410, L410M, L410MA, F414, E510, E510MA, E510KA, L510, L510MA, R522MA.
• Common replacement part numbers: B31N1912, C31N1912, 0B200-03680000 and 3ICP5/57/80.
• Examples of supported SKUs: E410MA-EK007TS, E410MA-EK991TS, L410MA-BV037TS, E510KA-EJ033TS and R522MA variants.

How does the battery's specification affect laptop run time?

The Fancy Buying battery has a nominal voltage of 11.55V and rated capacity of 42Wh, which determines how long your laptop can run between charges. While actual runtime depends on workload and system condition, replacing a degraded battery with an original-spec 42Wh pack typically restores the device to factory-like endurance.

• Battery type: Li-polymer for compact, lightweight power delivery.
• Cells: 3-cell configuration balance size and capacity.
• Nominal output: 11.55 volts and 42 watt-hours for comparable runtime to original units.
• Includes: one B31N1912 battery, installation tool, and user manual.

Is installation difficult and what should I prepare?

Installation is straightforward for anyone comfortable opening a laptop back panel with basic tools. The package includes an auxiliary tool and step-by-step instructions, but always power down, unplug, and ground yourself before starting to avoid static damage.

• Power safety: shut down and disconnect the charger before opening the laptop.
• Tools: small Phillips screwdriver and the included installation tool suffice for most VivoBook models.
• Precautions: avoid bending cells and ensure connector aligns firmly with the motherboard socket.

What warranty and return options come with this battery?

Fancy Buying provides a 60-day return window and a 12-month replacement warranty for manufacturing defects. If you need assistance, contact the seller through the store’s "ask a question" link for support and warranty instructions.

• Return policy: 60 days from delivery for eligible returns.
• Replacement warranty: 12 months for defects under normal use.
• Support: contact via seller store messaging to initiate returns or replacements.

Who is this for: This battery is ideal for Asus VivoBook owners whose machines still match the listed model numbers but suffer from reduced battery life, unexpected shutdowns, or charging issues. It’s aimed at DIY repairers, small IT shops, and anyone who wants an original-spec replacement at a lower cost than factory service—provided the laptop’s model and existing battery part number correspond to the compatibility list.