Futurebatt B31N1911 Laptop Battery for ASUS VivoBook

Futurebatt B31N1911 is a direct replacement 11.55V, 42Wh laptop battery designed to restore runtime for compatible ASUS VivoBook Flip 14, VivoBook 14, K413/X413/F413 and related models.

If your ASUS VivoBook shows reduced run time, unexpected shutdowns, or a battery health warning, replacing the original battery with a high-quality aftermarket pack can be the fastest, most cost-effective fix. The Futurebatt B31N1911 / C31N1911 battery is built with Grade A cells, a protective circuit board, and manufacturer-tested specifications that match the originals, giving you reliable daily performance without the premium OEM price.

How do I know this battery fits my ASUS laptop?

Compatibility is based on model numbers and OEM part references. Futurebatt lists the replacement part numbers and a wide set of VivoBook model families it fits, so match either the original part number from your laptop or the model series.

• Compatible part numbers: B31N1911, C31N1911, 0B200-03580300, 0B200-03580500, 3ICP5/57/80.
• Fit families: VivoBook Flip 14 TM420IA series and VivoBook 14 M413/M413DA series.
• Also fits many F413, K413, X413, X421 and similar ASUS notebook variants—check your laptop’s underside label for the original part number.

What power and performance can I expect from this replacement battery?

The Futurebatt unit delivers the same nominal voltage and similar capacity to the original, providing comparable runtime for everyday tasks like web browsing, streaming, and document editing. The battery uses three high-grade cells and a smart protection circuit for efficient charging and stable output.

• Voltage: 11.55V — matches typical OEM specification.
• Capacity: 42Wh — provides balanced runtime and lightness for thin laptops.
• Cell type: 3-cell Grade A cells for consistent charge/discharge behavior.

What safety features and lifecycle can I rely on?

Futurebatt assemblies include the protection electronics and quality control steps necessary for safe daily use. These protections reduce the risk of overcharge, deep discharge, and short circuits while helping the battery reach a practical cycle life.

• Protections: overcharge, over-discharge, over-temperature, and short-circuit protection.
• Durability: high-quality boards and cells engineered for up to roughly 500 charge cycles under normal conditions.
• Testing: units are 100% new and tested at manufacture to ensure expected voltage and capacity.

What warranty and support are included if something goes wrong?

Futurebatt backs this battery with standard customer care and a replacement policy so you’re not left with a defective pack. Contact options make it straightforward to request a refund or replacement within the covered period.

• 30-day refund policy for early returns.
• 12-month replacement warranty for manufacturing faults.
• 24-hour email support from the Futurebatt customer service team.

Who is this for: The Futurebatt B31N1911 replacement battery is aimed at ASUS VivoBook owners whose laptops are showing decreased battery life or warning messages, DIY repairers replacing a worn pack, and anyone looking to extend the useful life of a compatible VivoBook without paying OEM prices. If you need a drop-in electrical match to your original B31N1911/C31N1911 pack and expect consistent daily performance with standard laptop workloads, this battery is a practical, cost-conscious option.