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Rectangular black lithium-ion laptop battery, model C31N1339

KingSener

KingSener C31N1339 laptop battery 50Wh 11.31V

SKU CH-KY13-FKGTD MPN C31N1339

A 50 Wh, 11.31 V lithium-ion replacement battery compatible with ASUS ZenBook UX303 and TP300 series laptops

  • Battery Voltage11.31V
  • Battery Capacity50WH
  • 50 Wh capacity powers compatible ASUS ZenBook models
  • 31 V output matches original C31N1339 specification
  • Li-ion cells manufactured in Korea for reliable performance
  • Replacement part number C31N1339 fits UX303L and TP300 series
  • Brand-new condition with one-year manufacturer warranty included

Direct replacement for ASUS ZenBook UX303

This KingSener C31N1339 battery replaces the original ASUS part for ZenBook UX303L, UX303LN, TP300L, TP300LA, TP300LJ, Q302L, Q302LA and Q302LG notebooks. It restores mobile power to these specific ultrabooks when the factory pack no longer holds a useful charge. Buyers with other ASUS models or different part numbers cannot use this unit.

50 Wh lithium-ion pack at 11.31 V

The 50 Wh capacity and 11.31 V rating match the OEM electrical specification, so the laptop's power management sees no difference from the original battery. Normal operation produces no additional heat or fan noise beyond what the original pack generated. The cell chemistry is standard lithium-ion with Korean-sourced cells.

50 Wh capacity decides runtime

A 50 Wh rating determines how long the ZenBook runs on battery power before recharging. If your workflow demands significantly longer unplugged time, this capacity will not meet that need. The voltage and physical fit are fixed by the C31N1339 part number, so only the watt-hour figure separates this pack from higher-capacity alternatives that do not exist for this chassis.

Highlights

  • 50 Wh capacity powers compatible ASUS ZenBook models
  • 31 V output matches original C31N1339 specification
  • Li-ion cells manufactured in Korea for reliable performance
  • Replacement part number C31N1339 fits UX303L and TP300 series
  • Brand-new condition with one-year manufacturer warranty included

Specifications

BrandKingSener
ModelC31N1339
Part NumberC31N1339
Battery Voltage11.31V
Battery Capacity50WH

Questions about this item

How do I install the KingSener C31N1339 battery in my ASUS ZenBook UX303L, and what step is often missed?

Remove the bottom case screws, disconnect the old battery cable from the motherboard before lifting it out, then connect the new C31N1339 cable securely and reassemble; the step often missed is disconnecting the cable first.

What maintenance or replacement will the KingSener C31N1339 Li-ion 50Wh battery need later?

As a Li-ion pack it requires no scheduled maintenance; expect to replace the C31N1339 once capacity drops below usable levels, typically after several hundred charge cycles.

What limit appears first on the KingSener C31N1339 11.31V battery during sustained heavy use?

The 50Wh capacity sets the runtime ceiling; under continuous high load the pack will deplete faster and voltage will sag toward the cutoff threshold sooner.

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