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Black rectangular laptop battery pack with label showing 42Wh 11.52V

POWER-FENG

POWER-FENG 42Wh B31N1631 battery for Asus VivoBook 15 X505BP X505BA X505BA-RB94

SKU CH-QXHN-XZQSZ

42Wh 11.52V lithium-polymer replacement battery compatible with Asus VivoBook 15 X505 and F505 series laptops

  • TypeBattery
  • Battery TypeLaptop Batteries
  • Li-polymer chemistry provides stable 11.52V output for consistent performance
  • 42Wh capacity delivers extended runtime between charges
  • 3653mAh rating supports reliable daily use
  • Direct replacement for B31N1631 part number
  • Compatible with multiple VivoBook 15 and F505 series models

Direct replacement battery

The POWER-FENG 42Wh B31N1631 is a brand-new lithium-polymer battery built for Asus VivoBook 15 models including X505BP, X505BA and X505BA-RB94. It restores original runtime for owners whose factory pack no longer holds a charge.

Voltage and capacity match

Rated at 11.52V and 42Wh or 3653mAh, this cell delivers the exact electrical specification the notebook expects. A different voltage or capacity would prevent the system from recognising the battery or cause incorrect charge reporting.

Fits listed chassis only

The pack fits the X505, F505, K505 and A505 series chassis shown in the compatibility list. It does not suit other Asus ranges or thinner ultraportables that use a different form factor or connector.

Highlights

  • Li-polymer chemistry provides stable 11.52V output for consistent performance
  • 42Wh capacity delivers extended runtime between charges
  • 3653mAh rating supports reliable daily use
  • Direct replacement for B31N1631 part number
  • Compatible with multiple VivoBook 15 and F505 series models

Specifications

TypeBattery
Battery TypeLaptop Batteries

Questions about this item

What does the 42Wh rating mean for daily runtime on my VivoBook 15?

The 42Wh capacity at 11.52V delivers roughly 3653mAh, giving several hours of typical mixed use on compatible X505 or F505 models before needing a recharge.

Does this pack use the standard B31N1631 connector and voltage for my Asus laptop?

Yes, it matches the B31N1631 part number and 11.52V specification, so it plugs directly into the VivoBook 15 X505BA, X505BP and related F505 series without adapters.

Will this black Li-polymer unit fit the internal battery bay of an X505ZA or K505B?

The pack is built to the B31N1631 form factor and fits the internal bay of the listed X505, F505, K505 and A505 models without modification.

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