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

FOCUSTEC

FOCUSTEC M5Y1K 40Wh 14.8V 4-cell laptop battery 3467 5459 5551 5552 5566 Vostro P47F P52F

SKU CH-SWNW-YJPDD

4-cell lithium-ion replacement battery rated at 40Wh and 14.8V for select Dell Inspiron and Vostro models from 2012 to 2017

  • Battery TypeLithium-Ion
  • 40Wh capacity powers compatible Dell laptops through a full workday
  • 4-cell lithium-ion design delivers 14.8V for stable performance
  • Built-in circuit protection meets CE, UL and FCC safety standards
  • Class A cells support up to 500 recharge cycles
  • Replaces M5Y1K, P47F, P52F and other OEM part numbers

Replacement battery for Dell Inspiron and Vostro

This 14.8V lithium-ion pack delivers 40Wh across four cells and matches the M5Y1K part number used in Inspiron 14, 15 and 17 models from the 3000 and 5000 series as well as Vostro 3458 and 3558 units. It is intended for owners of those specific laptops who need a direct OEM replacement.

Simple swap with built-in protection

The battery fits the original compartment without tools and the integrated circuit protection guards against overcharge, over-discharge and short circuits. Installers must verify the 2012-2017 production window because later revisions of the same chassis use a different connector and will not accept this pack.

Limited to 2012-2017 hardware revisions

The 14.8V 40Wh specification only applies to the listed part numbers such as P47F, P51F and P52F; newer motherboards expect a different pin-out or voltage curve. Buyers with laptops manufactured after 2017 or with unlisted service tags cannot use this unit.

Highlights

  • 40Wh capacity powers compatible Dell laptops through a full workday
  • 4-cell lithium-ion design delivers 14.8V for stable performance
  • Built-in circuit protection meets CE, UL and FCC safety standards
  • Class A cells support up to 500 recharge cycles
  • Replaces M5Y1K, P47F, P52F and other OEM part numbers

Specifications

Battery TypeLithium-Ion

Questions about this item

How can I confirm the FOCUSTEC M5Y1K battery is working correctly after installing it in my Dell laptop?

After installation, the laptop should power on using only the battery, show a charge level in the OS, and reach 100 % without shutting down unexpectedly. The built-in circuit protection and CE/UL/FCC safety testing support stable operation.

What is included with the FOCUSTEC M5Y1K 40Wh battery and do I need any extra parts to fit it?

The package contains the 4-cell lithium-ion battery rated at 40Wh / 2700mAh / 14.8V. No additional cables, tools or adapters are required; it replaces the original M5Y1K, P47F, P52F and other listed part numbers directly.

Which capacity version of the M5Y1K battery should I select for my Dell Inspiron or Vostro model?

This listing offers the 40Wh / 2700mAh 4-cell version at 14.8V, marked for 2012-2017 model years. Choose this version if your device uses part numbers such as M5Y1K, GXVJ3, HD4J0, K185W, P47F, P52F or the Dell 451-BBMG / 453-BBBP codes.

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