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Rectangular black lithium-ion battery pack, 207g

KingSener

KingSener C31N1815 laptop battery 11.55V 50Wh

SKU CH-2MQ8-XZSNZ MPN C31N1815

Replacement lithium-ion battery for ASUS Zenbook 13 UX333 series, 11.55V 50Wh capacity

  • Battery typeLithium-Ion
  • Battery voltage rating11.55 V
  • Battery capacity4,335 mAh
  • Product colorBlack
  • Product typeBattery
  • Compatible with4,335 mAh/50WH
  • 50Wh capacity powers your ASUS Zenbook 13 through a full workday
  • 55V lithium-ion chemistry matches the original C31N1815 specification
  • 4335mAh rating restores factory runtime for UX333 UX333F UX333FA UX333FN series
  • 207g lightweight cell keeps the ultraportable profile intact
  • Replaces part numbers C31N1815 0B200-03150000 3ICP5/70/81 for direct fit

Replacement battery for Zenbook 13

This KingSener C31N1815 lithium-ion cell delivers 11.55 V and 50 Wh to restore runtime on compatible ASUS ultrabooks. It matches the original 4335 mAh capacity and fits the slim 13-inch chassis without modification. The unit ships new and ready to install.

Compatibility and limits

Suits owners of Zenbook 13 UX333, UX333F, UX333FA, UX333FN, RX333F, RX333FA, RX333FN, BX333F, BX333FA, BX333FN and U3300FN models needing a direct swap. Not for users whose laptop requires a different voltage, connector layout or higher watt-hour rating.

Deciding specification

The 11.55 V nominal voltage and 50 Wh energy rating determine whether this battery matches the device's power circuit; verify both values against the original part before purchase.

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 nameC31N1815
Part numberC31N1815
Product colorBlack
Product typeBattery
Power
Battery typeLithium-Ion
Battery voltage rating11.55 V
Battery capacity4,335 mAh
Size & build
Product weight207g
Compatibility
Compatible with4,335 mAh/50WH

Questions about this item

Which capacity matches my ZenBook 13 UX333FA — 4335 mAh or 50 Wh?

Both figures describe the same cell; 4335 mAh at 11.55 V equals 50 Wh, so either label points to the correct replacement.

What does 11.55 V mean for daily runtime on my UX333FN?

The pack delivers 11.55 V nominal; your laptop’s power management draws what it needs, so runtime depends on workload, screen brightness and background tasks rather than the voltage alone.

Does the 3ICP5/70/81 cell code limit which ZenBook 13 models can use this battery?

The code identifies the internal cell format; the battery is listed as compatible with UX333, UX333F, UX333FA, UX333FN, RX333, BX333 and U3300FN series, so any of those models can use it.

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