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Rectangular black lithium-ion laptop battery pack with four cells

FOCUSTEC

FOCUSTEC M5Y1K laptop battery 33Wh 2200mAh 14.8V 4-cell

SKU CH-ERGA-EEJRF

A 33 Wh, 4-cell lithium-ion replacement battery for Dell Inspiron 14, 15 and 17 series laptops

  • Battery TypeLithium-Ion
  • Restores laptop mobility with 33Wh 2200mAh 14.8V capacity
  • Four lithium-ion cells deliver reliable power for daily use
  • Tested to meet OEM specifications for consistent performance
  • Built-in short-circuit overheat and overload protections
  • Compatible with Dell Inspiron 14 15 17 3000 5000 series

Compatible Dell Inspiron Models

This replacement battery fits a wide range of Dell Inspiron 14, 15 and 17 series laptops including the 3000 and 5000 families. It covers models such as 3451, 3458, 3551, 3558, 5458, 5558, 5758 and many related part numbers. Buyers with laptops outside this specific Dell lineup cannot use this battery.

Installation And Common Issues

The battery is a direct internal replacement for the original Dell pack and installs without soldering or special tools. Most difficulties arise when the laptop model number is misidentified or when the connector orientation differs from the original unit. Ensure the part number on your old battery matches WKRJ2, HD4J0, GXVJ3, 07G07, 6YFVW or K185W before fitting.

Capacity And Voltage Specification

The pack uses four lithium-ion cells rated at 33Wh, 2200mAh and 14.8V to meet OEM specifications. This capacity determines how long the laptop runs on a single charge. Systems that require a different voltage or a higher watt-hour rating will not operate correctly with this unit.

Highlights

  • Restores laptop mobility with 33Wh 2200mAh 14.8V capacity
  • Four lithium-ion cells deliver reliable power for daily use
  • Tested to meet OEM specifications for consistent performance
  • Built-in short-circuit overheat and overload protections
  • Compatible with Dell Inspiron 14 15 17 3000 5000 series

Specifications

Battery TypeLithium-Ion

Questions about this item

How can I confirm the 33 Wh 14.8 V pack is charging correctly after fitting it?

The battery meter should show a rising charge percentage and hold a full cycle without sudden drops; the OS will also report the design capacity as 33 Wh and 14.8 V.

Does the box include fitting tools or only the 4-cell lithium-ion battery itself?

Only the 4-cell lithium-ion battery is supplied; screwdrivers or opening tools must be sourced separately.

My Dell is a 15-5558 — is that the right model for this M5Y1K replacement?

Yes, 15-5558 appears in the compatible list, so this 33 Wh 2200 mAh 14.8 V pack matches that model.

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