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Rectangular black lithium-ion laptop battery with label showing 14.8V 40WH 2600mAh

FOCUSTEC

FOCUSTEC D3451 14.8V 40WH 2600mAh laptop battery

SKU CH-E18R-33AMM MPN D3451

A 4-cell lithium-ion replacement battery rated at 14.8 V and 40 Wh for compatible Dell Inspiron and Vostro laptops

  • Battery TypeLithium-Ion
  • Grade A cells reduce leakage risk and stabilise output
  • Built-in circuit protection improves safety and extends usable life
  • 40 Wh capacity at 14.8 V powers compatible Dell models
  • 2600 mAh 4-cell lithium-ion design fits Inspiron and Vostro 3000 series
  • Replaces OEM part numbers including M5Y1K GXVJ3 HD4J0 K185W WKRJ2

Direct replacement for listed Dell models

This FOCUSTEC D3451 lithium-ion battery delivers 14.8 V and 40 Wh from a 4-cell, 2600 mAh pack. It is built as a direct replacement for Dell Inspiron 3451, 3551, 5558, 5758 and Vostro 3458, 3558 units, plus the broader Inspiron 14 and 15 3000 Series families. Grade A cells and an integrated protection circuit aim to reduce leakage risk and stabilise output over the service life.

Verify the exact model number before ordering

Confirm that your laptop carries one of the compatible part numbers shown in the specifications, such as M5Y1K, GXVJ3, HD4J0, K185W or WKRJ2. The supplier notes that the Dell Inspiron 15-5551 is not supported, so cross-reference the sticker on your original battery or the service tag to avoid a mismatch.

Typical thermal and power behaviour

Under normal workloads the pack operates at its rated 14.8 V with the internal protection circuit managing charge and discharge currents. The lithium-ion chemistry and Grade A cells are chosen to limit self-heating and maintain stable voltage, while the built-in safeguards help prevent excessive draw that could stress the laptop’s power rail.

Highlights

  • Grade A cells reduce leakage risk and stabilise output
  • Built-in circuit protection improves safety and extends usable life
  • 40 Wh capacity at 14.8 V powers compatible Dell models
  • 2600 mAh 4-cell lithium-ion design fits Inspiron and Vostro 3000 series
  • Replaces OEM part numbers including M5Y1K GXVJ3 HD4J0 K185W WKRJ2

Specifications

Battery TypeLithium-Ion

Questions about this item

Does the FOCUSTEC D3451 battery ship with any cables or tools, or must they be purchased separately?

The replacement battery is supplied as a standalone unit. No cables, screws or tools are included, so reuse the hardware from the original Dell pack.

How do I confirm the D3451 is the correct capacity for my Inspiron 3451 versus the 3551 or Vostro 3458?

All listed models — Inspiron 3451, 3551, 5558, 5758 and Vostro 3458, 3558 — share the same 14.8 V, 2600 mAh, 40 Wh specification, so the D3451 fits each one.

What does the 40 Wh rating mean for daily runtime on an Inspiron 15 3000 Series?

At 40 Wh the pack delivers roughly the same capacity as the original Dell M5Y1K battery, providing comparable unplugged time for typical office workloads.

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