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Black rectangular lithium-polymer laptop battery with two screwdrivers

NShi

NShi C31N1339 50Wh 11.31V laptop battery

SKU CH-QY1F-9283N

Lithium-polymer 50 Wh battery for Asus ZenBook UX303 and Q302 series, includes two screwdrivers

  • Battery TypeLithium-Ion
  • 50 Wh capacity powers extended work sessions
  • 31 V lithium-polymer chemistry matches original specifications
  • Three-cell design keeps weight low for ultraportable use
  • Built-in overcharge, overdischarge, over-temperature and short-circuit protection
  • Supports up to 500 recharge cycles over battery life

Replacement Battery for Asus ZenBook UX303 Q302

This 11.31 V lithium-polymer pack delivers 50 Wh capacity across three cells. It fits Asus ZenBook UX303 UX303L UX303LA UX303LB UX303LN UX303LNB UX303UA UX303UB Q302L Q302LA Q302LAB Q302LD Q302LJ Q302UA RX303 BX303 and Transformer Book Flip TP300LA TP300LAB TP303LD TP300LJ TP300UA models. The unit ships new with two screwdrivers included.

Upgrading from a Depleted Original Pack

A swap makes sense when the factory battery no longer holds a useful charge or shuts down under load. The replacement restores the original 50 Wh rating and is rated for up to 500 recharge cycles. Built-in circuitry guards against overcharge overdischarge over-temperature and short-circuit conditions.

Verify the Part Number Before Ordering

Confirm that your laptop uses part number C31N1339 0B200-9300000 or 3ICP7/55/90 printed on the existing battery. Check that the voltage reads 11.31 V and the capacity matches 50 Wh or 3470 mAh. Ensure the physical dimensions and connector orientation suit the UX303 Q302 or TP300 chassis. Buyers needing a different voltage or a higher-capacity design should look elsewhere.

Highlights

  • 50 Wh capacity powers extended work sessions
  • 31 V lithium-polymer chemistry matches original specifications
  • Three-cell design keeps weight low for ultraportable use
  • Built-in overcharge, overdischarge, over-temperature and short-circuit protection
  • Supports up to 500 recharge cycles over battery life

Specifications

Battery TypeLithium-Ion

Questions about this item

What tools are required to install the C31N1339 battery in an Asus ZenBook UX303?

The package includes two free screwdrivers for the installation. No additional tools are needed to fit the 3-cell lithium-polymer pack.

Which step is most often missed when replacing the 11.31V battery in a ZenBook UX303UB?

After fitting the battery, the connector must be pressed firmly until it clicks; a loose connection prevents charging even though the pack sits flush.

How many recharge cycles does the 50Wh C31N1339 pack support before replacement is needed?

The manufacturer rates the lithium-polymer cells for up to 500 full recharge cycles over the life of the battery.

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