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Rectangular black lithium-ion laptop battery pack

FOCUSTEC

FOCUSTEC 40Wh 14.8V XCMRD laptop battery for Dell Inspiron 15 3000 Series

SKU CH-39PQ-N084E

40 Wh lithium-ion battery powers compatible Dell Inspiron, Latitude and Vostro laptops at 14.8 V

  • Battery TypeLithium-Ion
  • 40 Wh capacity powers compatible Dell Inspiron 15 3000 Series models
  • 8 V lithium-ion chemistry matches original XCMRD voltage specification
  • Four-cell design with Grade A cells supports fast charging and low power consumption
  • Built-in circuit protection certified to CE FCC RoHS standards ensures safe operation
  • Replaces multiple Dell part numbers including FW1MN 4WY7C and 312-1390

Replacement battery for Dell Inspiron 15 3000

This 40Wh lithium-ion pack fits Dell Inspiron 14, 15 and 17 models from the 3000 Series as well as select Latitude and Vostro laptops. It replaces the original XCMRD module and matches the 14.8V specification exactly. The four-cell design restores mobile runtime for daily office work and study sessions. Condition is new and the unit ships ready to install.

Thermals noise and power draw

Lithium-ion chemistry keeps heat output low during normal charging and discharge cycles. No moving parts mean silent operation in any environment. The 40Wh capacity draws modest power from the adapter and the built-in protection circuit regulates current to maintain stable voltage. Grade A cells support efficient energy transfer without excess warmth.

Upgrade from worn original cells

This battery replaces an ageing pack that no longer holds charge or triggers sudden shutdowns. The jump is worth it when runtime has dropped below useful levels or the system warns of a degraded cell. It is not for users needing higher capacity than 40Wh or those whose laptop requires a different voltage or form factor. Compatibility covers the listed part numbers only.

Highlights

  • 40 Wh capacity powers compatible Dell Inspiron 15 3000 Series models
  • 8 V lithium-ion chemistry matches original XCMRD voltage specification
  • Four-cell design with Grade A cells supports fast charging and low power consumption
  • Built-in circuit protection certified to CE FCC RoHS standards ensures safe operation
  • Replaces multiple Dell part numbers including FW1MN 4WY7C and 312-1390

Specifications

Battery TypeLithium-Ion

Questions about this item

How do I install the XCMRD 14.8V 40Wh battery in my Dell Inspiron 15 3541, and what step is often missed?

Power off the laptop, unplug the AC adapter, remove the bottom screws, disconnect the old battery cable before lifting it out, then connect the new XCMRD battery cable firmly before reassembling.

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

The 40Wh pack uses lithium-ion cells that lose capacity over time; plan to replace the battery when run-time no longer meets your needs.

What limit appears first during sustained use of this 14.8V 40Wh battery?

The 40 watt-hour capacity sets the total energy available per charge, so run-time under continuous load is the first practical limit.

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