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Black rectangular laptop battery with connector strip

KingSener

KingSener C21N1509 laptop battery 7.6V 38WH

SKU CH-M6B2-5N2JG MPN C21N1509

7.6 V 38 Wh lithium-ion replacement battery fits ASUS A556, X556, K556, F556 and Vivobook models

  • Battery Voltage7.6V
  • Battery Capacity38WH
  • 38 Wh capacity extends unplugged runtime
  • 6 V matches original laptop specifications
  • Li-ion cells deliver stable power output
  • 100 % compatible with listed ASUS models
  • Brand-new replacement battery with one-year coverage

Replacement battery for ASUS Vivobook models

The KingSener C21N1509 is a new lithium-ion laptop battery rated at 7.6V and 38WH. It is built to match the original dimensions for ASUS A556, X556, K556, F556 and Vivobook series devices. High-quality cells and PCB deliver stable capacity and longer running time without false capacity claims.

Verify your original battery part number before

Confirm that your existing battery carries the C21N1509, C21PQ9H or C21N15WZ part number and compare the connector layout with product photos. The supplier advises a full charge and discharge cycle two or three times on first use to condition the cells. Avoid leaving the AC adapter connected continuously while the battery is installed.

Fits directly into the existing battery bay

No adapter brackets or cable modifications are required because the replacement matches the original size and mounting points. The pack frees you from tethered outlet use and restores mobile runtime for daily workloads. Store at more than 80% charge if the laptop will be unused for a month or longer.

Highlights

  • 38 Wh capacity extends unplugged runtime
  • 6 V matches original laptop specifications
  • Li-ion cells deliver stable power output
  • 100 % compatible with listed ASUS models
  • Brand-new replacement battery with one-year coverage

Specifications

BrandKingSener
ModelC21N1509
Part NumberC21N1509
Battery Voltage7.6V
Battery Capacity38WH

Questions about this item

Does the KingSener C21N1509 battery come with any tools or cables, or must they be purchased separately?

The battery is a direct replacement unit matching the original size and connector. No tools or cables are included in the box.

The listing shows 7.6V and 38WH — is there another capacity option for the same C21N1509 model?

Only the 38WH capacity is offered for the C21N1509 model. The voltage is fixed at 7.6V to match the original specification.

What does the 38WH rating mean for actual runtime in an ASUS Vivobook X556UA?

The 38WH design capacity restores the original factory runtime. Full charge cycles during the first few uses help the cells reach their rated capacity.

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