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

DELL

DELL 14.8V 40Wh M5Y1K Laptop Battery for Inspiron 5459 5551 5552 5555 5558 5559 5755 5758 5759

SKU CH-8M45-RX71M

A 14.8V 40Wh lithium-ion replacement battery compatible with Dell Inspiron 5459 5551 5552 5555 5558 5559 5755 5758 5759 models

  • CompatibilityCompatible with Dell Inspiron 5459 5551 5552 5555 5558 5559
  • Battery TypeLithium-Ion
  • 40Wh capacity extends runtime between charges
  • 8V lithium-ion chemistry matches original power spec
  • Four premium cells deliver consistent output
  • Fits Inspiron 5459 5551 5552 5555 5558 5559 5755 5758 5759
  • CE and RoHS certified for safety and environmental standards

Compatible Dell Inspiron Battery

This 40Wh lithium-ion battery replaces the original power cell in Dell Inspiron 5459 5551 5552 5555 5558 5559 5755 5758 5759 models. It delivers 14.8V output through a four-cell design built to CE and RoHS standards. The unit is intended for owners of those specific laptops who need a direct replacement.

Straightforward Swap With One Catch

Installation requires opening the laptop chassis and disconnecting the old pack before fitting the new one. The supplier notes that two different batteries exist for these model numbers and they are not interchangeable. Buyers must compare the physical layout and connector of their original battery against the product photos before ordering.

Verify Model And Original Battery First

Confirm the exact Inspiron model number printed on the laptop base or in the BIOS. Remove the existing battery and check its part number, shape and connector position against the images supplied. This battery will not fit laptops outside the listed series or units that use the alternative battery design.

Highlights

  • 40Wh capacity extends runtime between charges
  • 8V lithium-ion chemistry matches original power spec
  • Four premium cells deliver consistent output
  • Fits Inspiron 5459 5551 5552 5555 5558 5559 5755 5758 5759
  • CE and RoHS certified for safety and environmental standards

Specifications

CompatibilityCompatible with Dell Inspiron 5459 5551 5552 5555 5558 5559 5755 5758 5759
Battery TypeLithium-Ion

Questions about this item

How can I confirm the 40Wh lithium-ion battery is working correctly after installing it in my Inspiron 5559?

The laptop should power on immediately, the operating system will report a full charge capacity near 40Wh, and battery life should match the rated runtime for a 4-cell pack.

What comes with the M5Y1K battery and what must I purchase separately?

Only the 14.8V 40Wh battery is included; no tools, screws, or AC adapter are supplied, so reuse the existing hardware from your Inspiron 5459 or 5758.

Which version of this battery fits my specific Inspiron model?

This 14.8V 40Wh 4-cell pack fits Inspiron 5459, 5551, 5552, 5555, 5558, 5559, 5755, 5758 and 5759; compare your original battery to the product photos because two incompatible variants exist for some models.

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