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Rectangular black 4-cell lithium-ion laptop battery

DELL

DELL M5Y1K 14.8V 40Wh 4-Cell Lithium-Ion Laptop Battery

SKU CH-XYAK-6BQ33

A 14.8V 40Wh 4-cell lithium-ion battery compatible with Dell Inspiron N3451 N3452 N3458 N3551 N3552 N3558 N5451 models

  • CompatibilityCompatible with Dell Inspiron N3451 N3452 N3458 N3551 N3552
  • Battery TypeLithium-Ion
  • 40 Wh capacity powers Dell Inspiron N3451 N3452 N3458 N3551 N3552 N3558 N5451
  • 8 V lithium-ion chemistry delivers stable voltage for consistent performance
  • Four premium cells provide reliable energy density for everyday workloads
  • CE and RoHS certified to meet safety and environmental standards
  • 100 % compatibility verified for listed models ensuring exact fit

Direct Replacement for Dell Inspiron

The DELL M5Y1K is a new 40Wh lithium-ion battery built for Dell Inspiron N3451 N3452 N3458 N3551 N3552 N3558 N5451 models. It uses four premium cells at 14.8V to restore original runtime. CE and RoHS certification confirms compliance with safety and environmental standards. A one-year replacement warranty covers defects in materials or workmanship.

Thermal Behaviour and Power Delivery

Lithium-ion chemistry keeps self-discharge low so the pack holds charge during storage. Normal operation stays within the laptop’s designed thermal envelope without extra cooling. The 40Wh capacity supplies steady current for typical workloads, reducing unexpected shutdowns. No additional power draw is introduced beyond the original specification.

Installation and System Fit

The battery slots into the existing compartment with no tools or adapters required. Buyers must compare the original unit against product photos because two incompatible variants exist for these models. It frees the laptop from permanent AC tethering and restores mobile use. Units needing a different form factor or voltage cannot use this pack.

Highlights

  • 40 Wh capacity powers Dell Inspiron N3451 N3452 N3458 N3551 N3552 N3558 N5451
  • 8 V lithium-ion chemistry delivers stable voltage for consistent performance
  • Four premium cells provide reliable energy density for everyday workloads
  • CE and RoHS certified to meet safety and environmental standards
  • 100 % compatibility verified for listed models ensuring exact fit

Specifications

CompatibilityCompatible with Dell Inspiron N3451 N3452 N3458 N3551 N3552 N3558 N5451
Battery TypeLithium-Ion

Questions about this item

How do I install the M5Y1K battery in my Inspiron N3451 and what step is often missed?

Power off the laptop, unplug the AC adapter, remove the bottom case screws, disconnect the old battery cable before lifting it out, connect the new M5Y1K cable firmly, then reassemble; the step often missed is disconnecting the cable before removing the old pack.

What maintenance or replacement will the 40Wh 4-cell lithium-ion pack need later?

The lithium-ion cells degrade with each charge cycle; when run time becomes too short for your workflow, replace the entire M5Y1K pack — no user-serviceable parts inside.

What limit appears first on the 14.8V battery during sustained heavy use?

Under continuous high load the cells hit their thermal and voltage sag limits first, causing the laptop to throttle performance or shut down to protect the pack.

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