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Black rectangular lithium-ion laptop battery with connector pins

Beisite

Beisite C31N1821 11.55V 50Wh laptop battery for Asus ZenBook S13 UX392

SKU CH-CHA7-FZ18X

Replacement lithium-ion battery rated 11.55V 50Wh for Asus ZenBook S13 UX392 series

  • ColorBlack
  • TypeBattery
  • Compatibilityfor ZenBook S13 UX392 UX392FN UX392FA UX392FN-XS77 UX392FN-X
  • Battery TypeLithium-Ion
  • Battery Voltage11.55V
  • Battery Capacity50Wh
  • Ready-to-install replacement for ZenBook S13 UX392 series
  • 55V 50Wh lithium-ion cell restores full runtime
  • Replaces OEM part numbers C31N1821 and 0B200-03210100
  • Brand-new condition with 12-month manufacturer warranty
  • Black finish matches original chassis colour

Replacement Battery for ZenBook S13 UX392

This 11.55V 50Wh lithium-ion battery replaces part numbers C31N1821 and 0B200-03210100. It fits Asus ZenBook S13 UX392 series laptops including UX392FA and UX392FN variants. The black unit arrives new and is rated for 12 months of warranty coverage.

For owners of listed UX392 models only

The battery matches the voltage and capacity specified for the ZenBook S13 UX392 family. Buyers with other Asus ultraportables or different UX series chassis should verify their exact part number before ordering. This unit will not fit laptops outside the declared compatibility list.

Direct swap restores original runtime

Installing this battery returns the notebook to its factory 50Wh capacity without additional software or accessories. No drivers, cables or calibration tools are bundled; the change is purely hardware. Users who need extended capacity beyond the original specification will not find that option here.

Highlights

  • Ready-to-install replacement for ZenBook S13 UX392 series
  • 55V 50Wh lithium-ion cell restores full runtime
  • Replaces OEM part numbers C31N1821 and 0B200-03210100
  • Brand-new condition with 12-month manufacturer warranty
  • Black finish matches original chassis colour

Specifications

BrandC31N1821
ModelC31N1821
ColorBlack
TypeBattery
Compatibilityfor ZenBook S13 UX392 UX392FN UX392FA UX392FN-XS77 UX392FN-XS71 Series
Battery TypeLithium-Ion
Battery Voltage11.55V
Battery Capacity50Wh

Questions about this item

Will this 11.55V 50Wh C31N1821 battery fit my Asus ZenBook S13 UX392FN without any extra parts?

It is a direct replacement for part numbers C31N1821 and 0B200-03210100 and fits the listed ZenBook S13 UX392 series models.

Can I keep my original Asus charger when I install this 11.55V replacement battery?

Yes, the 11.55V 50Wh lithium-ion cell matches the original voltage so the existing Asus power adapter charges it normally.

How do I confirm the new 50Wh battery is working correctly after I fit it?

The OS should show the design capacity near 50Wh and the battery should charge to 100 % and report 11.55V when full.

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