Visiodirect Asus VivoBook laptop battery

Asus uses many battery references across the VivoBook range, often of the B31N... or C31N... form, printed directly on the original battery. Note it down, along with the exact model name on the label underneath the laptop. Those two pieces of information beat the marketing name, which covers configurations with different batteries.

Lithium-ion does not need conditioning like older technologies: no ritual twelve-hour charge. A first full charge followed by a near-complete discharge does help the system gauge recalibrate, because it is the gauge, not the battery, that learns the real capacity. If the displayed percentage looks odd for the first few days, that is normal.