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Rectangular black lithium-polymer laptop battery, 7.2V 29Wh

Dr. Battery

Dr. Battery B21N1329 7.2V 29Wh laptop battery

SKU CH-9Z2E-6MD6J

Replacement lithium-polymer battery for Asus X553, X453 and D553MA series laptops, 7.2 V 29 Wh capacity with built-in protection circuits

  • Battery typeLithium Polymer
  • Battery voltage rating7.2 V
  • Battery capacity4,000 mAh
  • Product colorBlack
  • Product typeBattery
  • Compatible withAsus: D553MA | D553MA-HH01 | R515MA | X453 | X453MA | X553 |
  • Restores laptop run-time with 29 Wh lithium-polymer capacity
  • Built-in short-circuit, overheat and overload protection for safe use
  • Direct replacement for Asus B21N1329 and 0B200-00840000 packs
  • Fits X553, X453, R515MA, D553MA and related models
  • Dr. Battery Professional Series quality since 2006

Dr. Battery B21N1329 7.2V 29Wh replacement

This new lithium-polymer battery replaces Asus part numbers 0B200-00840000 and B21N1329. It fits compatible Asus models including D553MA, R515MA, X453MA and X553MA variants. The pack delivers 7.2 volts and 29 watt-hours from quality grade cells.

Sustained discharge with protection circuits

Built-in safeguards guard against short circuit, overheat and overload during continuous use. The professional series cells maintain stable voltage output across the working session. Capacity of 4000 mAh supports typical mobile workloads without sudden shutdowns.

Verify model and voltage before ordering

Check the original battery label for the exact Asus model name and part number shown in the compatibility list. Confirm the original battery voltage matches 7.2V. This unit does not suit laptops outside the listed Asus series or those requiring a different voltage.

How it compares

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

Price $43.99
Pricier than about 76% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameDr. Battery
Model nameDRPROAS256P-01
Product colorBlack
Product typeBattery
Power
Battery typeLithium Polymer
Battery voltage rating7.2 V
Battery capacity4,000 mAh
Compatibility
Compatible withAsus: D553MA | D553MA-HH01 | R515MA | X453 | X453MA | X553 | X553MA-DB01 | X553MA-SX457B |
Asus: 0B200-00840000 | B21N1329

Questions about this item

Does the 7.2V lithium-polymer pack run hot or draw extra power during all-day use?

The cell chemistry and 7.2V rating match the original Asus design, so heat and power draw stay within the laptop's normal thermal envelope.

What must I already have to install this B21N1329 replacement?

A compatible Asus model from the X453, X553, D553, R515 or X453MA series and a small Phillips screwdriver for the battery bay.

Will this 29Wh battery work alongside my original Asus charger and motherboard?

Yes — the voltage, capacity and protection circuits are built to the same 7.2V specification as the 0B200-00840000 original, so the existing charger and power management function normally.

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