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Black rectangular lithium-ion laptop battery with label showing 42Wh 11.52V

E-buy

E-buy B31N1842 42Wh laptop battery for VivoBook S15 S531FA S531FL X531FL K531FA

SKU CH-D0WD-ABN7S

42Wh lithium-ion replacement battery at 11.52V fits VivoBook S15 S531FA, S531FL, X531FL and K531FA models

  • Battery TypeLithium-Ion
  • 42 Wh capacity keeps the laptop running longer between charges
  • 52 V lithium-ion chemistry matches the original power profile
  • Direct replacement for part numbers B31N1842, 0B200-03440000 and 3ICP5/57/80
  • Fits VivoBook S15 S531FA, S531FL, X531FL and K531FA series models
  • Brand-new cell pack restores full charge cycles from day one

Replacement Battery for VivoBook S15 S531

This 42Wh lithium-ion pack replaces the original B31N1842 cell in VivoBook S15 S531FA, S531FL, X531FL and K531FA models. It delivers 11.52V and fits the listed part numbers including 0B200-03440000 and 3ICP5/57/80. The black unit ships new with a six-month warranty.

Upgrading from a Degraded Original

Swap this in when the factory battery no longer holds a useful charge or shuts down under load. The jump is worth it if runtime has dropped below half of the original figure or the laptop throttles on battery power alone. It restores the designed 42Wh capacity without changing the form factor.

Straightforward Internal Swap

Removal usually requires a Torx or Phillips driver to open the bottom case and disconnect the old pack. Common issues are stripped case screws, forgotten connector latch release and bent ribbon cables during reassembly. Take photos of cable routing before unplugging anything.

Highlights

  • 42 Wh capacity keeps the laptop running longer between charges
  • 52 V lithium-ion chemistry matches the original power profile
  • Direct replacement for part numbers B31N1842, 0B200-03440000 and 3ICP5/57/80
  • Fits VivoBook S15 S531FA, S531FL, X531FL and K531FA series models
  • Brand-new cell pack restores full charge cycles from day one

Specifications

Battery TypeLithium-Ion

Questions about this item

What are the exact part numbers this battery replaces?

The battery replaces part numbers B31N1842, 0B200-03440000 and 3ICP5/57/80.

How is the battery installed inside the VivoBook S15 chassis?

Remove the bottom case screws, disconnect the old pack from the motherboard connector, fit the new unit in the same orientation and reconnect the cable before reassembling.

When will the battery typically need replacement again?

Lithium-ion packs gradually lose capacity; expect reduced runtime after several hundred full charge cycles depending on daily use patterns.

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