IEFUU Laptop Battery 14.8V 2200mAh for HP ProBook/Envy

IEFUU VI04 is a direct-fit 14.8V, 4-cell lithium-ion replacement battery designed to revive compatible HP ProBook, Envy and Pavilion laptops with genuine-fit performance and reliable cycle life.

If your HP ProBook 440 G2, 450 G2, HP Envy 14/15/17 or selected Pavilion models are showing short runtimes or failing to charge, this IEFUU replacement restores portable power while matching the original part numbers (756743-001, 756745-001, 756479-421, HSTNN-DB6K, HSTNN-LB6K and variants). The pack supplies 2200mAh at 14.8 volts across four cells, and is CE/FCC certified to meet common safety and regulatory requirements. It’s engineered as a like-for-like substitute to help you get back to work, study, or travel without replacing the entire laptop.

Which HP models and original part numbers does this battery replace?

This IEFUU battery fits multiple HP notebooks by design, aligning with both model and spare part identifiers used by HP. Confirming compatibility by checking your laptop’s model or the original battery label prevents ordering the wrong pack.

• Compatible models: HP ProBook 440 G2, 450 G2; HP Envy 14, 15, 17; selected HP Pavilion 15 and 17 laptops.
• Replaces spare/part numbers: 756743-001, 756745-001, 756479-421, 756478-421, 756478-422 and related HSTNN-DB6K/LB6K identifiers.
• Cross-references include vendor codes like HSTNN-DB6J and HSTNN-LB6I for wider fit coverage.

How long will the IEFUU battery hold a charge and what’s its lifespan?

The pack is rated 2200mAh with an output of 14.8V and uses four lithium-ion cells. Under normal usage it provides reliable runtime comparable to OEM packs, and its design supports up to 500 recharge cycles before noticeable capacity loss.

• Capacity: 2200mAh — typical for compact laptop packs of this class.
• Voltage: 14.8V to match original laptop power requirements.
• Cycle life: up to ~500 full recharge cycles with gradual capacity decrease thereafter.
• Safety: CE and FCC certifications to help ensure regulatory compliance.

Is installation straightforward and are there safety precautions I should follow?

Installing this replacement is a simple process for most users: power down the laptop, remove the existing battery per your model’s procedure, and insert the IEFUU pack until it clicks. Observe basic battery handling rules to protect the product and your device.

• Always fully shut down and unplug the laptop before swapping batteries.
• Inspect the battery bay and connectors for dust or damage before installation.
• Do not puncture, deform, or expose the pack to high heat; follow disposal regulations for lithium batteries.
• Confirm the part number printed on the old battery matches one of the compatible codes listed.

What practical benefits does choosing this replacement deliver?

Replacing an aging battery restores usable unplugged time and avoids the cost or disruption of replacing the entire laptop. The IEFUU pack aims to be a cost-effective, OEM-compatible option that balances runtime, safety, and cycle durability.

• Restores productivity off the power cord for work and travel.
• Cost-efficient compared with buying a new laptop or official OEM pack in many markets.
• CE/FCC certification supports basic regulatory safety assurances.

Who this is for: This IEFUU VI04 replacement battery is intended for HP owners who need an affordable, drop-in power pack for older ProBook, Envy, and Pavilion laptops. It’s aimed at students, mobile professionals, technicians repairing client systems, or anyone who wants to extend the working life of a compatible HP notebook without complex upgrades. Before purchasing, verify your laptop’s model number or the original battery part code to ensure proper fit and function.