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Rectangular black lithium-ion laptop battery with connector pins

GOLDIX

GOLDIX B31N1729 42Wh 11.52V laptop battery for Asus VivoBook S15 S530 series

SKU CH-7ECF-2YAB1

42 Wh lithium-ion replacement battery at 11.52 V for Asus VivoBook S15 S530 series laptops

  • ColorBlack
  • TypeBattery
  • CompatibilityFor VivoBook S15 S530F S530UA S530UN X530FN S5300F Series
  • Battery TypeLithium-Ion
  • Battery Voltage11.52V
  • Battery Capacity42Wh
  • New battery restores full runtime to your VivoBook S15
  • 42 Wh lithium-ion cell matches original capacity exactly
  • 52 V output keeps power delivery stable and safe
  • Replaces part numbers B31N1729, 31CP5/57/81 and OEM codes
  • Compatible with S530, S530F, S530UA, S530UN, X530FN and many more

What this battery replaces

This new lithium-ion pack is built for Asus VivoBook S15 models including the S530F, S530UA, S530UN, X530FN and S5300F series. It matches the original B31N1729 part number and the 31CP5/57/81 reference, delivering 42Wh at 11.52V in a black housing.

Runtime under daily use

The 42Wh capacity supplies steady power for typical office workloads, web browsing and video playback without the sharp voltage drop seen in aged cells. Lithium-ion chemistry maintains consistent output across the discharge cycle so the laptop does not throttle unexpectedly during long sessions.

Straightforward swap and common pitfalls

The pack fits the internal battery bay using the existing screw points and connector, so no adapter cables or BIOS updates are required. Installers should disconnect the AC adapter and hold the power button for 15 seconds before opening the case; forgetting this step can leave the motherboard in a locked state that prevents the new cell from being recognised.

Highlights

  • New battery restores full runtime to your VivoBook S15
  • 42 Wh lithium-ion cell matches original capacity exactly
  • 52 V output keeps power delivery stable and safe
  • Replaces part numbers B31N1729, 31CP5/57/81 and OEM codes
  • Compatible with S530, S530F, S530UA, S530UN, X530FN and many more

Specifications

BrandB31N1729
ModelB31N1729
Part Number31CP5/57/81
ColorBlack
TypeBattery
CompatibilityFor VivoBook S15 S530F S530UA S530UN X530FN S5300F Series
Battery TypeLithium-Ion
Battery Voltage11.52V
Battery Capacity42Wh

Questions about this item

Does the 11.52V 42Wh lithium-ion cell run hot or draw extra power during all-day use?

The battery matches the original 11.52V 42Wh specification, so thermal output and power draw remain identical to the factory pack under normal workloads.

What must I already own to install this B31N1729 pack in my VivoBook S15?

A compatible Asus VivoBook S15 model such as the S530FA, S530UA, S530UN, X530FN or S5300F series, plus a small Phillips screwdriver for the bottom case screws.

Will this 31CP5/57/81 replacement work alongside the original charger and motherboard in an older S530FA-BQ001T?

Yes, it replaces part numbers B31N1729, 0B200-02920000 and 0B200-02920100, so the existing 11.52V charging circuit and firmware recognise it without changes.

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