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Rectangular black lithium-ion laptop battery, 11.55V 50Wh

GOLDIX

GOLDIX C31N2005 11.55V 50Wh laptop battery for Asus Chromebook CX9 CX3 ExpertBook B3 Flip

SKU CH-4PKB-4XK7X

A 11.55V 50Wh lithium-ion replacement battery compatible with Asus Chromebook CX9, CX3 and ExpertBook B3 Flip models

  • ColorBlack
  • TypeBattery
  • CompatibilityFor Chromebook CX9 CX9400CEA CX3 CX3400FMA Series
  • Battery TypeLithium-Ion
  • Battery Voltage11.55V
  • Battery Capacity50Wh
  • Reliable power with 11.55V 50Wh lithium-ion capacity
  • Exact fit for Asus Chromebook CX9 and CX3 series
  • Replaces original part numbers C31N2005 and 0B200-03810000
  • Compatible with ExpertBook B3 Flip B3402 models
  • Brand-new condition ensures full performance from first charge

C31N2005 50Wh replacement battery

This 11.55V lithium-ion unit replaces the original C31N2005 and 0B200-03810000 packs in Asus Chromebook CX9 CX9400CEA and CX3 CX3400FMA models. It also fits ExpertBook B3 Flip B3402 and B3402FEA variants. The black cell delivers 50Wh capacity for restored mobile runtime. Buyers needing a higher-capacity pack or a different voltage cannot use this part.

Single-cell lithium-ion voltage constraint

The 11.55V nominal rating is fixed by the cell chemistry and the laptop’s charging controller. The system will not accept a higher-voltage pack, and a lower-voltage unit will not power the device. Capacity is limited to the 50Wh rating; runtime scales linearly with the workload but cannot exceed the designed watt-hour envelope. No firmware update or hardware modification can alter these electrical limits.

Direct swap for depleted OEM packs

This battery replaces an exhausted factory unit when the original no longer holds a useful charge. The upgrade is worthwhile when the laptop otherwise meets the user’s needs and the chassis is intact. It is not a solution for machines with damaged charging circuits, swollen-bay deformation, or a requirement for longer runtime than the 50Wh design allows.

Highlights

  • Reliable power with 11.55V 50Wh lithium-ion capacity
  • Exact fit for Asus Chromebook CX9 and CX3 series
  • Replaces original part numbers C31N2005 and 0B200-03810000
  • Compatible with ExpertBook B3 Flip B3402 models
  • Brand-new condition ensures full performance from first charge

Specifications

BrandC31N2005
ModelC31N2005
Part Number0B200-03810000
ColorBlack
TypeBattery
CompatibilityFor Chromebook CX9 CX9400CEA CX3 CX3400FMA Series
Battery TypeLithium-Ion
Battery Voltage11.55V
Battery Capacity50Wh

Questions about this item

Is the C31N2005 50Wh battery the only capacity option for my Asus Chromebook CX9 or ExpertBook B3 Flip?

The C31N2005 is the direct replacement part number for the original 11.55V 50Wh battery used in the listed CX9, CX3 and ExpertBook B3 Flip models.

What runtime can I expect from the 11.55V 50Wh rating in daily use?

The 50Wh rating matches the original factory specification, so real-world runtime will be comparable to the battery that shipped with your Chromebook CX9 or ExpertBook B3 Flip.

Does this battery use a standard connector that fits the CX9400CEA and B3402FEA motherboards?

Yes, it is built to the C31N2005 / 0B200-03810000 specification, which is the exact connector and pinout used by the CX9400CEA, CX3400FMA and B3402 series mainboards.

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