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Rectangular black lithium-ion laptop battery with label showing 14.8V 40Wh 4-cell specifications

DELL

DELL 14.8V 40Wh 4-Cell Laptop Battery 451-BBMG 453-BBBP

SKU CH-RJ36-MJK2R

A 14.8 V, 40 Wh, 4-cell lithium-ion replacement battery for select Dell laptops

  • CompatibilityCompatible with Dell 451-BBMG 453-BBBP W6D4J WKRJ2 6YFVW 78V
  • Battery TypeLithium-Ion
  • Reliable power with 40Wh lithium-ion capacity
  • Exact fit for Dell 451-BBMG and 453-BBBP models
  • Stable 14.8V output for consistent performance
  • Premium 4-cell construction built to last
  • CE and RoHS certified for safety compliance

Replacement Battery for Dell Laptops

This 14.8V 40Wh lithium-ion battery replaces Dell part numbers 451-BBMG and 453-BBBP along with codes W6D4J, WKRJ2, 6YFVW, 78V9D, 1KFH3 and P51F. It uses a premium 4-cell design to restore reliable mobile power for compatible Dell notebooks. The unit is supplied new and carries CE and RoHS certification.

Critical Compatibility Check

The supplier notes that two different batteries exist for the same laptop model and they are not interchangeable. You must compare your original battery with the product photos to confirm the physical layout and connector match before ordering. No software or accessories are bundled that would alter the installation.

Pre-Installation Verification

Confirm your laptop accepts a 14.8V 40Wh 4-cell lithium-ion pack and that the part number on your old battery appears in the compatibility list above. Ensure the chassis can accommodate this specific cell configuration and voltage. Buyers needing a different voltage, capacity or cell count should not order this unit.

Highlights

  • Reliable power with 40Wh lithium-ion capacity
  • Exact fit for Dell 451-BBMG and 453-BBBP models
  • Stable 14.8V output for consistent performance
  • Premium 4-cell construction built to last
  • CE and RoHS certified for safety compliance

Specifications

CompatibilityCompatible with Dell 451-BBMG 453-BBBP W6D4J WKRJ2 6YFVW 78V9D 1KFH3 P51F
Battery TypeLithium-Ion

Questions about this item

How many charge cycles can the 40 Wh 4-cell lithium-ion pack handle before it needs replacement?

The 40 Wh 4-cell lithium-ion pack is rated for up to 100 % compatible performance and carries a full one-year replacement warranty covering defects in materials or craftsmanship.

What is the first limit reached during sustained heavy use — voltage drop, thermal throttle or capacity fade?

Under sustained load the 14.8 V pack will show capacity fade first; the lithium-ion chemistry gradually loses full-charge capacity over repeated cycles.

How much heat and fan noise does the battery add when the laptop runs all day on AC?

The battery itself generates minimal extra heat and no noise; it simply stores charge while the laptop's own cooling system manages system thermals.

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