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Black rectangular lithium-polymer laptop battery 7.6V 30Wh 4040mAh

POWER-FENG

POWER-FENG 30Wh B21N1329 7.6V 4040mAh laptop battery

SKU CH-AP32-9ARPD

30 Wh, 7.6 V lithium-polymer replacement battery for compatible Asus laptops

  • Battery typeLaptop Batteries
  • Product typeBattery
  • 30 Wh capacity powers Asus X453 series longer
  • 6 V Li-polymer chemistry matches original B21N1329 spec
  • 4040 mAh rating restores factory run-time
  • Brand-new condition ensures full cycle life from day one
  • Replaces B21N1329 across D553M F553 X553 and X403M models

Replacement Battery for Asus 403 453 503 553 Series

This 30Wh lithium-polymer unit replaces part number B21N1329 in compatible Asus laptops. It delivers 7.6V and 4040mAh in a black casing. The battery is supplied new and ready for installation.

Upgrades Worn or Failed Original Cells

Swapping the original pack restores full runtime when the old unit no longer holds charge. The jump is worth it when the laptop shuts down unexpectedly or reports a capacity drop below usable levels. Direct fit avoids adapter cables or firmware mismatches.

Suits Owners of Listed Asus Models Needing

Builders repairing other brands or models not in the compatibility list should look elsewhere. Users requiring higher capacity than 30Wh or a different voltage must choose an alternative part.

How it compares

Measured against everything we stock in Laptop Chargers & Batteries, at today’s prices. Recalculated every night.

Price $22.99
Cheaper than about 66% of the 27,790 comparable items (median $30.99).

Specifications

Product
Product typeBattery
Power
Battery typeLaptop Batteries

Questions about this item

Will the 7.6V 30Wh B21N1329 battery fit my Asus X553MA without modification?

The pack is built to the B21N1329 form factor and lists the X553MA among its compatible models, so it seats directly in the original battery bay.

What is the correct order for connecting the 7.6V B21N1329 battery during installation?

Insert the battery into the compartment until the latch clicks, then attach the connector to the motherboard header; reversing this order can bend the fragile pins.

How do I know when the 4040mAh Li-polymer pack needs replacing?

Replace it when runtime drops far below the original 30Wh rating or the system reports a significant capacity loss in the battery health utility.

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