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

TAURKENAM

TAURKENAM 40Wh 14.8V 4-cell laptop battery XCMRD

SKU CH-C71H-M5KFH

A 40Wh 14.8V 4-cell lithium-ion replacement battery compatible with numerous Dell Latitude, Vostro and Inspiron models including Latitude 3440 and 3540

  • Battery TypeLithium-Ion
  • 40Wh capacity powers Dell Latitude 3440 and 3540 through a full workday
  • 8V 4-cell lithium-ion design matches original XCMRD specifications exactly
  • Replaces 4WY7C FW1MN 0MF69 and 30-plus OEM part numbers
  • Fits 14-inch 3421 3437 5421 5437 and 15-inch 3521 3531 3537 3541 3542 3543 models
  • Also compatible with 17-inch 3721 3737 5721 5737 Vostro 2421 2521 units

Replacement for Dell Latitude 15 3000

This new lithium-ion battery delivers 40Wh at 14.8V across four cells. It is built as a direct replacement for part numbers including XCMRD, 4WY7C, FW1MN and a long list of Dell service codes. The pack fits Latitude 3440 and 3540 models as well as Vostro 2421 and 2521 units.

Upgrade from depleted original cells

The unit replaces an ageing or failed factory battery that no longer holds a useful charge. Swapping it restores full mobile runtime without changing the laptop chassis or power adapter. The jump is worth it when the original pack shows rapid capacity loss or sudden shutdowns under load.

Fits select Dell 14 15 and 17 series

Compatible models include Dell 14 3421, 3437, 14R 5421, 5437, 15 3521, 3531, 3537, 3541, 3542, 3543, 15R 5521, 5537, 17 3721, 3737 and 17R 5721, 5737. It does not fit the standard Dell 15 3000 series. No extra cables or tools are required beyond the laptop's own battery bay.

Highlights

  • 40Wh capacity powers Dell Latitude 3440 and 3540 through a full workday
  • 8V 4-cell lithium-ion design matches original XCMRD specifications exactly
  • Replaces 4WY7C FW1MN 0MF69 and 30-plus OEM part numbers
  • Fits 14-inch 3421 3437 5421 5437 and 15-inch 3521 3531 3537 3541 3542 3543 models
  • Also compatible with 17-inch 3721 3737 5721 5737 Vostro 2421 2521 units

Specifications

Battery TypeLithium-Ion

Questions about this item

What physical space does the XCMRD 40Wh battery require inside a Dell Latitude 3440?

It is a standard 4-cell lithium-ion module shaped for the Latitude 3440 battery bay; the pack matches the original XCMRD form factor so no chassis modification is needed.

What is the installation step most people skip when fitting the 4WY7C replacement in a Dell 15 3542?

After sliding the pack into the bay, you must press firmly until both latch clicks engage; many users stop at the first click and the battery stays loose.

Which Dell part numbers indicate the XCMRD 14.8V pack is due for replacement in a Vostro 2521?

When the original 4WY7C, FW1MN, 0MF69, 24DRM, 49VTP, 4DMNG or any listed 312- or 451- part number shows reduced run-time, swap in this XCMRD unit.

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