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Black rectangular lithium-polymer laptop battery with model label C31N1339

POWER-FENG

POWER-FENG 50Wh C31N1339 Battery for Asus ZenBook UX303 TP300L Q302L

SKU CH-HFVF-5W2P5

Replacement 50 Wh 11.31 V Li-polymer battery compatible with Asus ZenBook UX303, TP300L and Q302L series

  • Battery typeLaptop Batteries
  • Product typeBattery
  • 50 Wh capacity supports longer unplugged sessions
  • 4300 mAh rating delivers consistent power output
  • 31 V matches original Asus specification exactly
  • Li-polymer chemistry keeps weight low and profile slim
  • Replaces C31N1339 across UX303, TP300L and Q302 series

Compatible Asus ZenBook Models

This 50Wh lithium-polymer battery replaces part number C31N1339 and fits Asus ZenBook UX303, UX303L, UX303LA, UX303LN, TP300L, Q302L, Q302LA, Q302LG, U303L and U303U ultrabooks. It supplies 11.31V and 4300mAh capacity in a black housing. The unit is brand new and ready for installation.

Sustained Runtime Behaviour

The 50Wh energy rating determines how long the ultrabook runs on a single charge under continuous workloads such as document editing or video playback. Lithium-polymer chemistry maintains stable voltage delivery across the discharge curve without memory effect. Capacity remains consistent over repeated cycles when the pack is kept within normal temperature limits.

Decisive Specification — 11.31V Voltage

The 11.31V output must match the original battery voltage exactly or the laptop will not recognise the pack or may refuse to charge. Verify the part number C31N1339 on your existing battery before purchase. This unit is not suitable for models requiring a different voltage or connector layout.

How it compares

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

Price $27.99
Cheaper than about 56% of the 27,790 comparable items (median $30.99).

Specifications

Product
Product typeBattery
Power
Battery typeLaptop Batteries

Questions about this item

How much heat does the 11.31V 50Wh battery generate during all-day use?

The 50Wh 11.31V Li-polymer cell runs at low internal resistance, so it stays cool under normal load and does not add noticeable heat to the chassis.

Which laptop model must I already own for the C31N1339 to fit?

It fits Asus ZenBook UX303, UX303L, UX303LN, UX303LA, TP300L, U303L, U303U, Q302L, Q302LA and Q302LG.

Will the 4300mAh pack work alongside the original 31Wh charger I kept?

Yes, the 11.31V 50Wh battery accepts the same 11.31V charging voltage, so your existing 31Wh adapter charges it without issue.

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