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Black rectangular lithium-ion laptop battery with connector port

GOLDIX

GOLDIX C31N1815 50Wh 11.55V laptop battery for Asus Zenbook 13 UX333

SKU CH-2A3Y-TH901

50 Wh lithium-ion replacement battery at 11.55 V for Asus Zenbook 13 UX333 series models

  • Battery typeLithium-Ion
  • Battery voltage rating11.55 V
  • Battery capacity50 Wh
  • Product colorBlack
  • Product typeBattery
  • Compatible withFor Zenbook 13 UX333 UX333F UX333FN UX333FA UX333FA-A3070T U
  • Ready-to-install replacement for Zenbook 13 UX333 series
  • 50Wh lithium-ion cell restores full runtime
  • 55V output matches original factory specification
  • Supports part numbers C31N1815, 3ICP5/70/81, 0B200-03150000
  • Brand-new condition ensures reliable performance from day one

Direct replacement for Zenbook 13 UX333 series

This new lithium-ion battery replaces the original C31N1815 pack in Asus Zenbook 13 UX333, UX333F, UX333FA and UX333FN models. It matches the 11.55V voltage and 50Wh capacity specified for those ultraportables. Owners of listed sub-models such as UX333FA-A3070T or UX333FN-A4118T can install it without adapter changes. Buyers needing a different form factor or higher capacity should look elsewhere.

Thermal and power behaviour in daily use

The 50Wh lithium-ion cell delivers the same nominal voltage and energy rating as the factory unit, so discharge curves and thermal output remain unchanged during typical workloads. No additional cooling or power-management steps are required beyond the laptop's standard firmware. The pack is rated for normal charge cycles at 11.55V. Users expecting extended runtime beyond the original specification will not gain it from this replacement.

Build, connectors and everyday handling

The black casing uses the original connector layout and mounting points for the Zenbook 13 UX333 chassis, allowing a straight swap with a screwdriver. Part numbers 3ICP5/70/81 and 0B200-03150000 confirm mechanical alignment with the listed models. The 12-month warranty covers defects in materials. Technicians who need service manuals or torque values for other laptop families must source those separately.

How it compares

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

Price $25.99
Cheaper than about 60% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameC31N1815
Model nameC31N1815
Part number3ICP5/70/81
Product colorBlack
Product typeBattery
Power
Battery typeLithium-Ion
Battery voltage rating11.55 V
Battery capacity50 Wh
Compatibility
Compatible withFor Zenbook 13 UX333 UX333F UX333FN UX333FA UX333FA-A3070T U3300FN RX333FN BX333FN Series

Questions about this item

How do I install the C31N1815 battery in my Zenbook 13 UX333, and which step causes the most trouble?

Remove the bottom case screws, disconnect the old 3ICP5/70/81 pack, connect the new 11.55V unit, and refit the case; the step most often missed is forgetting to unplug the old battery connector before lifting the board.

What maintenance or replacement will the 50Wh lithium-ion pack need later?

Lithium-ion cells degrade with charge cycles; expect capacity to drop after 300 to 500 full cycles, at which point the C31N1815 should be swapped for a fresh 11.55V replacement.

What limit appears first when the 11.55V battery runs under sustained load?

The 50Wh capacity sets the runtime ceiling; under continuous high drain the pack will hit its energy limit and shut down before any thermal or voltage threshold is reached.

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