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Rectangular black lithium-ion laptop battery pack

BFKK

BFKK C31N1905 50Wh 11.55V laptop battery

SKU CH-WW7J-P7VV7 MPN C31N1905

A 50 Wh lithium-ion replacement battery at 11.55 V fits Asus Adolbook, Dolbook and VivoBook 13, 14 and 15-inch models from 2020 and includes screwdrivers

  • 50 Wh capacity powers compatible Asus VivoBook models through a full work day
  • 55 V lithium-ion chemistry delivers stable voltage for reliable system operation
  • Grade A cells rated for up to 500 recharge cycles extend usable service life
  • UL, CE, FCC and RoHS certifications confirm electrical and environmental safety compliance
  • Supplied screwdrivers simplify installation without sourcing separate tools

Replacement Battery for Select Asus VivoBook Models

The BFKK C31N1905 is a new lithium-ion laptop battery rated at 50 Wh and 11.55 V. It replaces the original Asus part numbers C31N1905 and 0B200-03580200. The pack uses grade A cells rated for up to 500 recharge cycles and includes a screwdriver set for installation. It carries UL, CE, FCC and RoHS certifications with built-in short-circuit, overheat and overload protections.

Suits Owners of Compatible 13 14 15 Inch VivoBook

This unit fits Asus Adolbook13 2020, Dolbook14 2020 and VivoBook S13 S333, S333JA, S14 S433F, S433, M433, S433FL, S433FA, S15 M533IA, S533FA and related S533 series models. Buyers whose laptops use a different voltage, connector or physical dimensions should look elsewhere. It is not for users needing a higher capacity than 50 Wh or a different cell chemistry.

Key Specification Is the 11.55 V 50 Wh Rating

The single figure that decides compatibility is the 11.55 V 50 Wh rating tied to part number C31N1905. Verify that your original battery shows exactly this voltage and capacity and the same 3ICP5/70/82 cell code. If those numbers differ, this battery will not work in your device.

Highlights

  • 50 Wh capacity powers compatible Asus VivoBook models through a full work day
  • 55 V lithium-ion chemistry delivers stable voltage for reliable system operation
  • Grade A cells rated for up to 500 recharge cycles extend usable service life
  • UL, CE, FCC and RoHS certifications confirm electrical and environmental safety compliance
  • Supplied screwdrivers simplify installation without sourcing separate tools

Specifications

No published specifications for this item yet.

Questions about this item

Which Asus VivoBook models will the C31N1905 battery fit without modification?

The battery replaces part number C31N1905 and 0B200-03580200 in Asus Adolbook13 2020, Dolbook14 2020, VivoBook S13 S333, S333JA, S14 S433F, S433, M433, S433FL, S433FA, S15 M533IA, S533FA and S533 series laptops.

Will the existing laptop charger still charge this 11.55V Li-ion pack correctly?

Yes, the original charger designed for the 11.55V system voltage will charge the 50Wh replacement pack normally.

How can I confirm the battery is delivering its rated 4335mAh capacity after installation?

Run a full charge-discharge cycle in the OS battery report or a tool like BatteryInfoView; the design capacity should read 50Wh or 4335mAh.

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