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Black rectangular lithium-polymer laptop battery, 50Wh 11.55V

POWER-FENG

POWER-FENG 50Wh C31N1905 laptop battery for Asus VivoBook S14 S15 D433 M433 S433 D533 M533 S533N

SKU CH-1T8F-4Z9GK

A 50 Wh, 11.55 V lithium-polymer replacement battery compatible with 14-inch and 15-inch Asus VivoBook S14 and S15 models including D433, M433, S433, D533, M533 and S533N

  • TypeBattery
  • Battery TypeLaptop Batteries
  • 50 Wh capacity extends runtime on compatible Asus VivoBook models
  • 55 V lithium-polymer chemistry delivers stable power output
  • Replaces original C31N1905 part for direct compatibility
  • Fits 14-inch and 15-inch VivoBook S, D, M series laptops
  • Brand-new cell ensures full charge cycles from first use

Capacity and compatibility

The 50Wh lithium-polymer cell operates at 11.55V and delivers 4335mAh for Asus VivoBook S14 and S15 chassis including the D433, M433, S433, D533, M533 and S533N series. It replaces part number C31N1905 and matches the original form factor in black finish.

Upgrade context

The unit restores runtime lost to cell ageing in daily-use ultraportables where the original pack no longer holds a full charge. Swapping becomes worthwhile when the machine shuts down early or throttles on battery power alone.

Installation notes

The pack sits under the bottom cover and connects through the standard internal cable; a small Phillips driver and a plastic pry tool are usually sufficient. Common issues include forgetting to disconnect the old pack before removal and misaligning the connector pins during reseating.

Highlights

  • 50 Wh capacity extends runtime on compatible Asus VivoBook models
  • 55 V lithium-polymer chemistry delivers stable power output
  • Replaces original C31N1905 part for direct compatibility
  • Fits 14-inch and 15-inch VivoBook S, D, M series laptops
  • Brand-new cell ensures full charge cycles from first use

Specifications

TypeBattery
Battery TypeLaptop Batteries

Questions about this item

Does the 50Wh 11.55V battery fit the 14-inch VivoBook S433FL chassis?

Yes, the C31N1905 unit is listed for the S433FL and other 14-inch models such as D433 and M433.

How do I install the Li-polymer pack without damaging the connector?

Disconnect the old pack, align the multi-pin plug with the motherboard header, press straight in until it clicks, then secure the bottom case screws.

When should I replace the 4335mAh cell if runtime drops?

Replace it when a full charge no longer lasts through a typical work session or the system reports a significant capacity loss.

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