KingSener C31N1843 laptop battery 42WH 11.55V for ASUS VivoBook S14 S432 S15 S532 X432FA X532FA

Drop-in replacement for VivoBook S14 and S15

The KingSener C31N1843 is a 42WH lithium-ion battery rated at 11.55V and 3550mAh. It matches the original part number 0B200-03430000 and fits Asus VivoBook S14 S432, S432FA, X432FA and X432FA-2S models as well as S15 S532, S532FA and S532FL variants. The black pack weighs 160g and ships new.

Steady output through a full workday

Lithium-ion chemistry delivers a stable 11.55V across the discharge curve, so the laptop keeps its performance level until the battery management system signals low charge. The 42WH capacity is designed to sustain typical office workloads for several hours without the voltage sag that can trigger throttling on degraded cells. No calibration routine beyond the first full cycle is required.

Replaces worn or swollen original packs

This unit restores mobility to any compatible VivoBook whose factory battery no longer holds a useful charge or has developed physical swelling. The jump is worth it when run-time has fallen below half of the original spec or when the chassis shows pressure marks from cell expansion. It is not for users who need a higher-capacity pack or a different voltage.