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Rectangular black lithium-ion laptop battery with label showing 42Wh 3-cell 11.52V

FOCUSTEC

FOCUSTEC B31N1637 C31N1637 42Wh 3-Cell laptop battery

SKU CH-YSRH-XFR6E

A 42 Wh three-cell lithium-ion battery at 11.52 V replaces part numbers B31N1637 and C31N1637 in compatible ASUS VivoBook 15, S15 and F510 models

  • Battery TypeLithium-Ion
  • 42Wh capacity powers compatible ASUS VivoBook models through a full workday
  • 52V lithium-ion chemistry delivers stable current with low self-discharge
  • Rigorously tested for true charge capacity and circuit protection
  • Certified to UL CE FCC RoHS safety standards
  • Supports up to 500 charging cycles over battery life

What this battery replaces

This FOCUSTEC replacement battery fits ASUS VivoBook 15 X510 and X510U series laptops, plus S15 S510 and F510 models. It is a direct swap for the original B31N1637 or C31N1637 pack. Buyers who need a different voltage or a higher capacity pack should look elsewhere.

The specification that decides fit

The pack delivers 11.52V and 42Wh from three lithium-ion cells rated at 3653mAh. Matching that voltage and the listed part numbers is the only way to confirm compatibility with your specific model.

Installing it and common pitfalls

The battery sits inside the chassis and connects to the motherboard with a multi-pin plug, so you must remove the bottom cover and disconnect the old pack first. A frequent issue is forgetting to detach the connector before lifting the battery, which can damage the cable or the board socket.

Highlights

  • 42Wh capacity powers compatible ASUS VivoBook models through a full workday
  • 52V lithium-ion chemistry delivers stable current with low self-discharge
  • Rigorously tested for true charge capacity and circuit protection
  • Certified to UL CE FCC RoHS safety standards
  • Supports up to 500 charging cycles over battery life

Specifications

Battery TypeLithium-Ion

Questions about this item

How long will the 42 Wh rating actually run my ASUS VivoBook X510?

The 42 Wh capacity typically delivers several hours of mixed use on compatible ASUS VivoBook 15 X510 and S510 models, though exact runtime depends on screen brightness, workload and battery health.

Does the 11.52 V output match the original ASUS battery specification?

Yes, the 11.52 V voltage matches the original B31N1637 and C31N1637 part numbers listed for ASUS VivoBook X510, S510 and F510 series laptops.

Will this 3-cell pack fit the internal bay of my ASUS F510UA without modification?

The battery is built as a direct replacement for part numbers B31N1637 and C31N1637 used in ASUS VivoBook 15 F510, X510 and S510 chassis, so it fits the existing bay.

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