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Rectangular black lithium-ion laptop battery pack

KingSener

KingSener B31N1909 laptop battery 11.4V 4212mAh 48Wh

SKU CH-8WA0-DG1FA MPN B31N1909

Replacement lithium-ion battery rated at 11.4 V and 4212 mAh for compatible Asus ExpertBook models

  • Battery voltage rating11.4 V
  • Battery capacity4,212 mAh/48 Wh
  • 48Wh capacity supports longer unplugged sessions
  • 4V output matches original Asus ExpertBook P2451 specifications
  • 4212mAh Li-ion cells deliver stable power throughout discharge
  • 100% new replacement fits P2451F and P2451FA without modification
  • 1-year warranty backs the 0B200-03670000 part number

Compatible Asus ExpertBook models

This KingSener B31N1909 replacement battery is built for the Asus ExpertBook P2 series, including the P2451, P2451F and P2451FA models. It delivers 11.4V and 48Wh capacity using Li-ion cells. The unit matches the original battery dimensions for direct installation without modification.

Users needing a direct replacement

Owners of the listed ExpertBook models who need a new 4212mAh power source will find this battery fits and functions as the original did. Buyers with different Asus series or other laptop brands should look elsewhere because the connector and case profile are specific to the P2451 family.

11.4V 48Wh Li-ion specification

The electrical rating of 11.4 volts and 48 watt-hours determines whether this part matches the laptop's power requirements. Confirm the original battery shows the same voltage and capacity before ordering to ensure correct operation.

How it compares

Measured against everything we stock in Laptop Chargers & Batteries, at today’s prices. Recalculated every night.

Price $30.99
Typical for this category: the median of 27,790 items is $30.99.

Specifications

Product
Brand nameKingSener
Model nameB31N1909
Part numberB31N1909
0B200-03670000
Power
Battery voltage rating11.4 V
Battery capacity4,212 mAh/48 Wh

Questions about this item

Which capacity matches the original 48Wh specification?

The battery is rated at 4212mAh and 48Wh, matching the original design capacity for the supported models.

What does the 11.4V rating mean for daily use?

The 11.4V output delivers the correct voltage for the Asus ExpertBook P2 series, ensuring stable power without modification.

Does the connector follow the standard B31N1909 pinout?

Yes, it uses the exact B31N1909 form factor and pin layout, so it fits the P2451, P2451F and P2451FA without adapters.

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