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Black rectangular lithium-ion battery pack with label showing model VJ8BPS57 11.4V 3520mAh

KingSener

KingSener VJ8BPS57 laptop battery 11.4V 3520mAh for VAIO S15 2019

SKU CH-5AXA-RZPD4 MPN VJ8BPS57

Replacement lithium-ion battery delivers 11.4V and 3520mAh for the VAIO S15 2019

  • Battery Voltage11.4V
  • Battery Capacity3520mAh
  • Replacement battery for VAIO S15 2019 models
  • 4V voltage matches original specification
  • 3520mAh capacity supports extended runtime
  • Li-ion cells deliver reliable power
  • Replaces part numbers 31CP5/57/80 and VJ8BPS57

Replacement battery specifications

The KingSener VJ8BPS57 is a lithium-ion replacement battery rated at 11.4V and 3520mAh. It carries part number 31CP5/57/80 and is supplied in black as a brand-new unit. The pack is built to match the original electrical specifications for the target notebook.

Compatibility and fit

This battery fits the VAIO S15 2019 model only. Buyers with other VAIO series or different production years cannot use this part. Anyone needing a higher-capacity pack or a different voltage must look elsewhere.

Voltage and capacity match

The decisive specification is the 11.4V 3520mAh rating, which must match the original battery exactly. If the original unit shows a different voltage or milliampere-hour value, this replacement will not work correctly.

Highlights

  • Replacement battery for VAIO S15 2019 models
  • 4V voltage matches original specification
  • 3520mAh capacity supports extended runtime
  • Li-ion cells deliver reliable power
  • Replaces part numbers 31CP5/57/80 and VJ8BPS57

Specifications

BrandKingSener
ModelVJ8BPS57
Part Number31CP5/57/80
VJ8BPS57
Battery Voltage11.4V
Battery Capacity3520mAh

Questions about this item

Does the VJ8BPS57 battery fit the VAIO S15 2019 chassis without modification?

The VJ8BPS57 is a direct replacement for part numbers 31CP5/57/80 and is built to the exact form factor used in the VAIO S15 2019.

What is the correct order to connect the VJ8BPS57 during installation?

Power off the laptop, disconnect the AC adapter, remove the bottom cover, unplug the old battery connector first, then connect the new VJ8BPS57 before reassembly.

How long will the 3520 mAh Li-ion VJ8BPS57 hold a useful charge?

Capacity will gradually reduce with each charge cycle; plan to replace the VJ8BPS57 when run time no longer meets your needs.

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