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Dell 451-BBSY 55W 4-cell laptop battery, rectangular black pack

DELL

DELL 451-BBSY 55W 4-cell laptop battery

SKU CH-YQ5S-18XEA

A 4-cell lithium-ion laptop battery rated at 55 Whr for portable power

  • Battery type4 Cell Lithium-Ion
  • Product typeOthers
  • 55 WHr capacity keeps your laptop running longer on the move
  • Four lithium-ion cells deliver reliable portable power for daily use
  • Genuine Dell 451-BBSY battery ensures exact fit and compatibility
  • New condition guarantees full rated performance from first charge
  • 55 watt-hour rating supports extended unplugged work sessions

What the 451-BBSY battery is for

The 451-BBSY is a 4-cell lithium-ion laptop battery rated at 55 WHr. It replaces the original pack in compatible Dell notebooks so the machine can run away from a wall outlet. The unit is new and ready for immediate use. Travellers and mobile workers who need a direct replacement will find it fits the specified models. Buyers who want a higher-capacity pack or a different form factor cannot use this part.

Installing the pack and common issues

Installation is a simple case of releasing the old battery latch, removing the depleted pack and clicking the new one into place until the latch engages. Most problems arise when the replacement is not recognised because the laptop BIOS is outdated or the battery connector is not fully seated. A cold boot after fitting usually resolves detection errors. Forcing the pack into a non-matching chassis will damage the connector and void any return.

Check your laptop before ordering

Verify that the service tag or parts list for your notebook lists 451-BBSY as the approved spare. Confirm the existing battery is also a 4-cell 55 WHr unit; a different cell count or capacity indicates a different part number. Ensure the battery bay latch mechanism works and that no swelling has warped the compartment. If the machine requires a 6-cell or 9-cell pack, this battery will not provide the expected runtime.

How it compares

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

Price $67.99
Pricier than about 90% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameDELL
Model name451-BBSY
Product typeOthers
Power
Battery type4 Cell Lithium-Ion

Questions about this item

How can I confirm the 55 WHr capacity is recognised after installing the 451-BBSY battery?

The operating system's battery report or BIOS power section will display the design capacity of 55 WHr once the 4-cell lithium-ion pack is seated and charged.

What comes with the 451-BBSY battery and what must I source separately?

The package contains the 4-cell lithium-ion battery only; a compatible Dell AC adapter and any required mounting screws are not included.

Which capacity version of the 451-BBSY should I select for my laptop?

This model is offered in a single 55 WHr 4-cell lithium-ion configuration, so choose this version when your service manual lists the 451-BBSY part number.

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