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Black rectangular laptop battery with label showing 42WH 11.55V

KingSener

KingSener B31N1911 42WH laptop battery

SKU CH-F48V-VK0RG MPN B31N1911

42WH 11.55V lithium-ion replacement battery fits ASUS VivoBook Flip 14 and VivoBook 14 models

  • ColorBlack
  • TypeBattery
  • Compatibility11.55V 42WH
  • Battery TypeLithium-Ion
  • Battery Capacity42WH
  • Weight160g
  • 42WH capacity powers the laptop through long sessions
  • 55V lithium-ion chemistry delivers stable output
  • 160g lightweight cell keeps the chassis portable
  • Replaces B31N1911 and C31N1911 for direct fit
  • Compatible with VivoBook Flip 14 TM420IA and X421 series

Direct replacement for VivoBook Flip 14

The KingSener B31N1911 is a 42WH lithium-ion battery built for ASUS VivoBook Flip 14 TM420IA and TP470EA series notebooks. It operates at 11.55V and weighs 160g. The black pack fits the original chassis without modification.

Steady output through a full workday

The 42WH cell delivers consistent voltage under continuous loads such as video playback or document editing. Lithium-ion chemistry maintains capacity over repeated cycles, avoiding the sharp drop-off seen in aged packs. Users can expect reliable runtime without sudden shutdowns.

Upgrade from a depleted original

This unit replaces part numbers B31N1911 and C31N1911 across M413DA, X421DA, X421EA and related models. The jump is worth it when the factory battery no longer holds a usable charge or shows swelling. Buyers needing higher capacity than 42WH or a different voltage should look elsewhere.

Highlights

  • 42WH capacity powers the laptop through long sessions
  • 55V lithium-ion chemistry delivers stable output
  • 160g lightweight cell keeps the chassis portable
  • Replaces B31N1911 and C31N1911 for direct fit
  • Compatible with VivoBook Flip 14 TM420IA and X421 series

Specifications

Brandkingsener
Part NumberB31N1911
ColorBlack
TypeBattery
Compatibility11.55V 42WH
Battery TypeLithium-Ion
Battery Capacity42WH
Weight160g

Questions about this item

Does the 11.55V 42WH Li-ion cell run hot or draw extra power during all-day use?

The 11.55V 42WH lithium-ion pack is designed to match the original thermal and power profile of the compatible ASUS models, so it does not add heat or draw beyond the laptop's normal charging circuit.

What must my ASUS laptop already have for this B31N1911 pack to fit and connect?

Your notebook must use the B31N1911 or C31N1911 form factor with the same connector; the battery replaces the original unit in the listed VivoBook Flip 14 TM420IA, TP470EA, M413DA and X421 series without adapters.

Will this 160g replacement work alongside the original charger and motherboard in my older X421DA?

Yes, the 11.55V 42WH cell communicates with the existing battery-management circuitry, so the original AC adapter and motherboard in X421DA, X421EA or X421FF models recognise it normally.

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