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Black rectangular lithium-ion laptop battery with connector strip

GOLDIX

GOLDIX C31N1821 11.55V 50Wh laptop battery for Asus ZenBook S13 UX392

SKU CH-53CC-B2QQX

11.55V 50Wh lithium-ion replacement battery fits Asus ZenBook S13 UX392 series

  • ColorBlack
  • TypeBattery
  • Battery TypeLithium-Ion
  • Battery Voltage11.55V
  • Battery Capacity50Wh
  • 50 Wh capacity powers extended work sessions
  • 55 V lithium-ion chemistry matches original specs
  • Direct replacement for C31N1821 and 0B200-03210100
  • Fits Asus ZenBook S13 UX392 FA and FN series
  • New condition with 12 month warranty coverage

Compatible Asus ZenBook S13 UX392 replacement

This 11.55V 50Wh lithium-ion battery replaces part numbers C31N1821 and 0B200-03210100. It fits the ZenBook S13 UX392, UX392FA and UX392FN series including numerous sub-models. The black pack is supplied new with a 12-month warranty. Buyers needing a different voltage or a higher capacity pack cannot use this unit.

Thermals noise and power draw in normal use

Lithium-ion chemistry delivers steady 11.55V output during typical office work and web browsing. The cell runs at laptop body temperature without active cooling and adds no audible noise. Power draw follows the system load profile of the original 50Wh design. No external adapter or fan is required for operation.

Behaviour under sustained load

Under continuous heavy workloads the 50Wh capacity discharges at a rate consistent with the original specification. Voltage remains stable until the low-threshold protection engages. The pack contains no thermal-throttling circuitry beyond the standard BMS. Users expecting extended runtime beyond the factory 50Wh rating will not achieve it with this replacement.

Highlights

  • 50 Wh capacity powers extended work sessions
  • 55 V lithium-ion chemistry matches original specs
  • Direct replacement for C31N1821 and 0B200-03210100
  • Fits Asus ZenBook S13 UX392 FA and FN series
  • New condition with 12 month warranty coverage

Specifications

BrandC31N1821
ModelC31N1821
Part Number0B200-03210100
ColorBlack
TypeBattery
Battery TypeLithium-Ion
Battery Voltage11.55V
Battery Capacity50Wh

Questions about this item

How do I install the C31N1821 battery in my ZenBook UX392, and which step do people often miss?

Power off the laptop, remove the bottom case screws, disconnect the old pack from the motherboard connector, fit the new 11.55V 50Wh unit, reconnect the cable securely, then reassemble; the step most often missed is fully seating the connector before screwing the case back on.

What maintenance or replacement will the C31N1821 battery need over time?

The lithium-ion pack gradually loses capacity with each charge cycle; when runtime drops below your needs, replace it with another C31N1821 or 0B200-03210100 unit — no scheduled servicing is required.

What limit appears first during sustained use of this 50Wh battery?

The 50 watt-hour capacity sets the runtime ceiling; under continuous load the pack will deplete before any thermal or voltage threshold is reached.

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