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Rectangular black lithium-ion laptop battery with label showing model M5Y1K

FOCUSTEC

FOCUSTEC M5Y1K laptop battery 2600mAh 33Wh 14.8V

SKU CH-KXYH-PCX3P

A 4-cell lithium-ion replacement battery rated at 2600mAh and 33Wh for compatible Dell Inspiron 14, 15 and 17 series laptops

  • Battery TypeLithium-Ion
  • Reliable power restored with 33Wh lithium-ion capacity
  • Fits Dell Inspiron 14, 15 and 17 3000 and 5000 series models
  • Four premium cells deliver up to 500 recharge cycles
  • UL, CE, FCC and RoHS certified with short-circuit and overheat protection
  • Tested to meet OEM specifications for true charge capacity

What this battery replaces

The FOCUSTEC M5Y1K is a new lithium-ion replacement battery rated at 2600mAh, 33Wh and 14.8V. It fits a wide range of Dell Inspiron 14, 15 and 17 models across the 3000 and 5000 series, including the 3451, 3551, 5458, 5558, 5758 and many related part numbers such as WKRJ2, HD4J0 and GXVJ3. It is intended for owners of those specific laptops who need to restore original runtime.

Practical limits of the design

The pack uses four lithium-ion cells and is certified to UL, CE, FCC and RoHS standards with built-in short-circuit, overheat and overload protection. The supplier states the cells can be recharged up to 500 times during their service life. No other electrical parameters or thermal limits are provided, so the battery should be treated as a direct OEM-specification replacement without additional performance claims.

When the upgrade makes sense

This unit replaces a depleted or failing original battery in the compatible Dell models listed above. The jump is worth it when the existing pack no longer holds a useful charge or has swollen. It is not suitable for laptops outside the stated compatibility list, for users who require a higher capacity than 33Wh, or for systems that demand a different voltage or form factor.

Highlights

  • Reliable power restored with 33Wh lithium-ion capacity
  • Fits Dell Inspiron 14, 15 and 17 3000 and 5000 series models
  • Four premium cells deliver up to 500 recharge cycles
  • UL, CE, FCC and RoHS certified with short-circuit and overheat protection
  • Tested to meet OEM specifications for true charge capacity

Specifications

Battery TypeLithium-Ion

Questions about this item

Should I choose the 2600mAh or 2200mAh version of the M5Y1K battery?

The product is supplied as a single 2600mAh 33Wh unit; the 2200mAh figure appears in the description as a cell-level rating, not as a separate model option.

What does the 33Wh rating mean for daily runtime on my Dell Inspiron?

At 14.8V the pack stores 33 watt-hours; a typical 15-inch Inspiron drawing 15–20W will run roughly 1.5–2 hours on a full charge.

Does the M5Y1K use a standard Dell battery interface or a proprietary connector?

It connects through the original Dell battery interface used by the listed Inspiron 3000 and 5000 series models, matching the factory pin-out.

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