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Rectangular black Dell laptop battery with four cells and 51W rating

DELL

DELL 451-BBLL 4-Cell 51W laptop battery

SKU CH-KEGD-QWX1P MPN 451-BBLL

A 4-cell, 51 Wh Dell battery that fits compatible laptops and installs without tools

  • 4-cell design delivers balanced runtime and weight
  • 51 Wh capacity supports extended mobile work sessions
  • Genuine Dell engineering ensures reliable cell matching
  • Primary battery slot fit keeps chassis profile unchanged
  • First listed February 2018 for proven field history

Replacement 4-cell 51W laptop battery

This primary 4-cell 51W unit replaces the original power pack in compatible Dell notebooks. It ships new and is designed for customer installation without specialised tools. The battery restores mobile runtime for users whose existing pack no longer holds a useful charge.

Capacity and cell count

The pack contains four cells and is rated at 51W, which is the single figure that determines whether it matches the original specification. If the original battery lists a different watt-hour rating or cell count, this unit will not be the correct replacement.

Installation and system fit

The battery is built for owner fitting, so no service centre visit is required. It slots into the existing battery bay and connects to the standard Dell power interface, leaving all ports and expansion slots free. Buyers who need a higher-capacity pack or a different form factor should look for an alternative model.

How it compares

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

Price $69.99
Pricier than about 90% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameDELL
Size & build
Shipping weight0.36 kg
Package size305 × 127 × 51 mm

Questions about this item

What does the 51W rating mean for actual runtime on my laptop?

The 51W capacity indicates the total energy the battery stores. Runtime varies by model, screen brightness, workload and power settings, so exact hours cannot be fixed.

How does the 4-cell design affect charging speed and compatibility?

The four-cell layout determines the voltage and capacity balance. It charges through the laptop's standard power circuit and fits only systems that list this exact part number.

What physical checks ensure the 451-BBLL fits my Dell chassis?

Verify the part number 451-BBLL on your current battery or service manual. The battery is shaped for specific Dell models and clicks into the dedicated bay.

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