B31N1911 C31N1911 Battery Replacement for ASUS VivoBook

This Fancy Buying battery is a drop-in power module designed to replace worn or failing batteries in many ASUS VivoBook notebooks. Engineered as a 3-cell lithium-polymer pack rated at 11.55 volts and 42 watt-hours, it restores run time while maintaining a compact, OEM-friendly profile. The package ships in black and includes a single screwdriver to make swap-outs faster for DIY repairs.

Which ASUS models will this B31N1911 battery work with?

The B31N1911 / C31N1911 is cross-compatible with numerous VivoBook and Flip series laptops. It covers multiple part numbers and model families used on 13- and 14-inch ASUS notebooks, so it’s suitable if your system lists those replacement ids.

• Compatible replacement numbers: B31N1911, C31N1911 and several OEM codes referenced by ASUS.
• Fits many VivoBook Flip 14 and VivoBook 14/13 series — check your laptop’s service label for matching part numbers.
• Works with both standard VivoBook and convertible (Flip) chassis from recent model lines.

How does its performance compare to the original battery?

This battery matches the original specification for voltage and capacity, providing comparable runtime when healthy. It uses a lithium-polymer chemistry and includes built-in circuit protection to protect against common electrical faults.

• Voltage: 11.55V — identical to many factory packs.
• Capacity: 42Wh — restores the original estimated battery life for compatible machines.
• Safety: internal protection circuitry plus CE and FCC compliance for electrical safety.

What should I know before installing the replacement pack?

Installation is straightforward for users comfortable opening a laptop — the kit even includes a screwdriver for convenience. Always power down, disconnect from AC, and follow anti-static precautions; verify connector orientation before seating the new pack.

• Included tool: one screwdriver provided to remove the back cover screws.
• Precautions: disconnect power and discharge static, back up data before service.
• Compatibility check: confirm part number on your existing battery or service sticker matches the replacement list.

What safety and quality steps does Fancy Buying follow?

Fancy Buying supplies batteries that meet common international safety marks and include protective circuitry to reduce the risk of overcurrent, shorting, or thermal issues. While certified for safety, always use a compatible charger and replace cells only with the correct model to preserve system stability.

• Certifications: CE and FCC compliance for regulatory safety standards.
• Protection: built-in circuit protection for reliable operation.
• Quality controls: tested for correct voltage, capacity, and connector fit before shipping.

Who is this for? If your ASUS VivoBook 13/14 or Flip 14 notebook shows diminished battery life, won’t hold a charge, or reports battery errors, this B31N1911/C31N1911 replacement from Fancy Buying is a practical, cost-effective fix. It suits DIY repairers, IT technicians refreshing laptop fleets, and anyone seeking an OEM-spec capacity swap without replacing the whole device. Always double-check the part number printed on your current battery or laptop service label to ensure an exact match before ordering.