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Black rectangular lithium-polymer laptop battery, model C31N1831

POWER-FENG

POWER-FENG 50Wh C31N1831 laptop battery

SKU CH-BG17-E07E4

A 50 Wh 11.55 V lithium-polymer replacement battery for select Asus 574 and 3540 series laptops

  • Battery typeLaptop Batteries
  • Product typeBattery
  • 50 Wh capacity supports longer unplugged sessions
  • 4335 mAh rating delivers reliable daily power
  • 55 V output matches original laptop spec
  • Li-polymer chemistry keeps weight low
  • Replaces C31N1831 for Asus P574FA and P3540FA series

50 Wh lithium-polymer battery for Asus laptops

This 50 Wh replacement battery uses lithium-polymer chemistry at 11.55 V and 4335 mAh. It fits Asus models P574FA, P3540FA, P3548FA, PE574FA and PX574FA. Buyers who need a different voltage or capacity cannot use this part.

Direct swap installation with part-number match

The unit replaces part number C31N1831 and fits the listed models without soldering or adapter cables. Misidentifying the exact model suffix is the most common reason a unit will not seat or charge.

50 Wh capacity decides runtime

Capacity of 50 Wh at 11.55 V determines how long the laptop runs on battery power. If the original specification calls for a different watt-hour rating this battery will not meet the requirement.

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
Product typeBattery
Power
Battery typeLaptop Batteries

Questions about this item

How can I verify the battery is charging correctly after installation?

The system should report 11.55V and a full charge near 4335mAh in the OS battery utility.

What is included in the package and do I need any extra parts?

Only the Li-polymer battery is supplied; no tools, screws or cables are included.

Which replacement part number matches my Asus laptop model?

Use part C31N1831 for P574FA, P3540FA, P3548FA, PE574FA or PX574FA.

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