We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Rectangular black laptop battery with label showing 14.8V 2800mAh 41Wh

PISKEKAT

PISKEKAT 2800mAh VI04 Laptop Battery for HP 756743-001 756745-001 756744-001 756478-851 ProBook 440 G2 450 G2

SKU CH-TAHT-WY004

A 2800 mAh lithium-ion replacement battery for HP ProBook 440 G2, 450 G2 and Envy 14, 15, 17 models

  • TypeOther
  • 2800 mAh capacity extends runtime between charges
  • 41 Wh energy rating supports demanding workloads
  • 8 V output matches original HP specifications
  • Four-cell lithium-ion design balances power and weight
  • Compatible with ProBook 440 G2, 450 G2 and Envy 14, 15, 17 series

Replacement Battery for HP ProBook and Envy

The PISKEKAT VI04 is a new lithium-ion laptop battery rated at 14.8V, 2800mAh and 41Wh. It replaces original HP part numbers including 756743-001, 756744-001, 756745-001 and 756746-001. The pack is built for HP ProBook 440 G2, 450 G2, 445 G2 and 455 G2 models as well as Envy 14, 15 and 17 series notebooks. It restores mobile power for users whose original cells no longer hold a charge.

Four-Cell Li-ion Pack with Direct Fit

The battery uses a four-cell Li-ion layout housed in a casing that matches the original footprint and connector placement. Alignment pins and the locking latch engage the same chassis slots as the factory unit so no tools or adapters are required. The 14.8V output matches the system voltage specification, allowing the laptop’s power management to report capacity and health data without recalibration.

Upgrade from Depleted or Lower-Capacity Originals

This unit suits owners of compatible ProBook, Envy and Pavilion laptops whose factory batteries have degraded below useful runtime. It also replaces earlier 41Wh packs carrying part numbers such as HSTNN-LB6K, HSTNN-DB6L or TPN-Q144 with a fresh 2800mAh cell set. Buyers needing higher watt-hour ratings or different form factors for other HP series should look elsewhere.

Highlights

  • 2800 mAh capacity extends runtime between charges
  • 41 Wh energy rating supports demanding workloads
  • 8 V output matches original HP specifications
  • Four-cell lithium-ion design balances power and weight
  • Compatible with ProBook 440 G2, 450 G2 and Envy 14, 15, 17 series

Specifications

TypeOther

Questions about this item

Does the 14.8 V 2800 mAh lithium‑ion cell match the original HP VI04 battery specification?

Yes, this replacement delivers 14.8 V, 2800 mAh and 41 Wh, matching the VI04 / VI04XL ratings listed for HP part numbers 756743‑001, 756744‑001, 756745‑001 and 756746‑001.

Will the four‑cell pack fit the battery bay of an HP ProBook 450 G2 without modification?

The pack is built to the same four‑cell form factor as the factory HSTNN‑LB6K / LB6J batteries used in ProBook 440 G2, 450 G2, 445 G2 and 455 G2 models, so it seats directly in the existing bay.

What is the correct orientation when inserting the battery into an Envy 15‑k000 series laptop?

Align the connector side with the motherboard header — the notched edge faces the rear vent — then press firmly until the latch clicks; the common mistake is sliding it in upside‑down, which prevents the lock from engaging.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.