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Black rectangular lithium-ion laptop battery with label showing 14.8V 40Wh 4-cell

M5Y1K 14.8V 40Wh 4-cell Li-ion laptop battery for Dell Inspiron 14 15 17 3000 5000 Vostro 3458 3558

SKU CH-6APY-XGJXD

14.8 V 40 Wh four-cell lithium-ion replacement battery for Dell Inspiron 14, 15 and 17 3000 and 5000 series plus Vostro 3458 and 3558

  • Battery typeLaptop Batteries
  • Battery voltage rating14.8 V
  • Battery capacity40 Wh
  • Product colorBlack
  • Product typeBattery
  • Compatible withFor Dell Inspiron 3451 3458 5455 5551 5555 3558 5458
  • Delivers 14.8V 40Wh capacity for extended runtime
  • Lithium-ion 4-cell chemistry provides reliable power delivery
  • Replaces M5Y1K and 28 other Dell part numbers
  • Fits Inspiron 14, 15, 17 3000 and 5000 series models
  • Brand-new condition ensures full 2600mAh capacity from first use

Compatible Dell models

This 14.8V 40Wh lithium-ion battery replaces the M5Y1K pack in Dell Inspiron 14, 15 and 17 laptops across the 3000 and 5000 series. It also fits Vostro 3458, 3459, 3558, 3559 and Latitude 3460, 3560 units. The four-cell design matches the original voltage and capacity specifications.

Installation and operation

The pack slots into the standard battery bay without tools or adapter cables. It charges from the existing AC or DC power inputs and restores mobile runtime for everyday office and study tasks. No firmware update or BIOS change is required for the listed models.

Who should buy this

Buyers with a compatible Dell laptop whose original battery no longer holds a charge will find a direct replacement here. Users needing higher capacity than 40Wh or a different voltage should look at other options. This unit does not support models outside the listed Inspiron, Vostro and Latitude ranges.

How it compares

Measured against everything we stock in Laptop Chargers & Batteries, at today’s prices. Recalculated every night.

Price $14.99
Cheaper than about 83% of the 27,790 comparable items (median $30.99).

Specifications

Product
Model nameFor Dell Inspiron 3451 3458 5455 5551 5555 3558 5458
Part numberM5Y1K
Product colorBlack
Product typeBattery
Power
Battery typeLaptop Batteries
Battery voltage rating14.8 V
Battery capacity40 Wh
Compatibility
Compatible withFor Dell Inspiron 3451 3458 5455 5551 5555 3558 5458

Questions about this item

How long will the 40Wh capacity last before the battery needs recharging under continuous load?

The 40Wh rating delivers 2600mAh at 14.8V; actual runtime depends on the laptop's power draw and workload.

Does the 4-cell lithium-ion pack run hot or make noise when the laptop is used all day?

Lithium-ion cells generate minimal heat and no audible noise; the pack relies on the laptop's own cooling system.

Which Dell models accept the M5Y1K part number without any adapter or cable change?

It fits Inspiron 14 3000/5000, 15 3000/5000, 17 5000, Vostro 3458/3558 and Latitude 3460/3560 listed in the compatibility data.

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