ASUS B31N1911 Replacement Laptop Battery, 3600mAh Li-ion, 11.4V, 42Wh, 3-Cell, Black, for VivoBook 15 Series

Mid-task on your ASUS VivoBook 15 and the battery dies? This Extra Digital Advanced replacement battery brings it back to life. Built around the B31N1911 original part number, it's a direct fit for popular models like the X512, F512, and A512, delivering reliable power for work, study, or entertainment. The 3600mAh lithium-ion cell provides a 42Wh energy reserve, so you can stay unplugged longer without hunting for an outlet.

Key specifications

• Battery type: Lithium-ion (Li-ion)
• Capacity: 3600 mAh
• Voltage: 11.4 V
• Energy: 42 Wh
• Number of cells: 3
• Colour: Black
• Condition: New
• Compatible with: ASUS VivoBook 15 series (X512, F512, R521, A512, K512, M512)
• Original part number: B31N1911
• Protection: Overcharge, over-discharge, over-current, short-circuit
• Rechargeable: Yes
• Certifications: CE, FCC, RoHS
• Operating temperature: 0°C to 45°C
• Storage temperature: -20°C to 60°C

Why choose it

This battery is engineered to match or exceed the original's performance, with built-in safeguards against common battery hazards. The Li-ion chemistry offers a high energy density, meaning more runtime in a compact form. It's a cost-effective way to extend the life of your laptop without compromising on quality or safety.

Ideal use cases

• Replacing a worn-out or swollen original battery
• Keeping a spare battery for travel or long workdays
• Refurbishing a used ASUS VivoBook 15 for resale or donation
• Upgrading a laptop that still has plenty of life left

Good to know

Installation is straightforward for anyone comfortable with basic laptop maintenance. Always ensure the laptop is powered off and disconnected from the charger before replacing the battery. For best results, fully charge and discharge the new battery a few times to calibrate it.