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Rectangular black lithium-ion laptop battery with label showing model and capacity

KingSener

KingSener PA5242U-1BRS 43Wh 11.4V laptop battery

SKU CH-MCKJ-7KDGE MPN PA5242U-1BRS

43Wh 11.4V Li-ion replacement battery for Toshiba Satellite Radius 12 P20W and P25W series laptops

  • 43Wh capacity powers extended sessions away from the mains
  • 4V lithium-ion chemistry matches original voltage requirements exactly
  • Direct replacement for PA5242U-1BRS and PA5242U part numbers
  • Fits Toshiba Satellite Radius 12 P20W and P25W series models
  • 3655mAh cell rating delivers reliable daily runtime

Replacement battery for Toshiba Radius 12

The KingSener PA5242U-1BRS is a new lithium-ion battery built for the Toshiba Satellite Radius 12 P20W and P25W series. It restores mobile power for owners of these specific ultraportables who need a direct swap for the original pack.

43 Wh capacity at 11.4 V

The pack delivers 43 Wh and 3655 mAh at 11.4 V, matching the electrical specification of the factory unit. Verify that your device lists part number PA5242U-1BRS or PA5242U before ordering; other Radius models use different packs.

Simple internal swap with common pitfalls

Installation requires opening the chassis and disconnecting the old pack, so basic disassembly comfort is needed. Common issues include forgetting to detach the connector before prying the battery loose and failing to seat the replacement firmly so the latch clicks.

Highlights

  • 43Wh capacity powers extended sessions away from the mains
  • 4V lithium-ion chemistry matches original voltage requirements exactly
  • Direct replacement for PA5242U-1BRS and PA5242U part numbers
  • Fits Toshiba Satellite Radius 12 P20W and P25W series models
  • 3655mAh cell rating delivers reliable daily runtime

Specifications

No published specifications for this item yet.

Questions about this item

How long will the 43Wh capacity actually run my Toshiba Satellite Radius 12 P20W?

The 43Wh rating means the pack stores 43 watt-hours of energy; real runtime depends on your screen brightness, CPU load and Wi-Fi use, but typical office work on this ultrabook yields several hours per charge.

Does the 11.4V voltage match the original PA5242U-1BRS specification exactly?

Yes, the replacement is built to 11.4V, matching the factory voltage for the Satellite Radius 12 P20W and P25W series so the laptop’s power management sees no difference.

Will this battery fit the P25W-C2304-4K chassis without modification?

It is designed as a direct drop-in for the PA5242U-1BRS form factor used across the Radius 12 P20W and P25W models, so it seats in the existing bay with the original screws.

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