2-power Dell Latitude E5440 Main Battery Pack - Akku - 99 mAh (2P-450-AFNP)

Unlike generic replacements that often underdeliver on runtime and longevity, the 2-POWER battery for the Dell Latitude E5440 is built around a 6-cell lithium-ion core that holds a true 48Wh charge. This means you can work through meetings, lectures, or travel without constantly hunting for a power outlet. The 11.1V output matches the original Dell specification exactly, so the laptop runs at its intended performance level and the battery gauge remains accurate.

Highlights

• 6-cell Li-ion construction for extended runtime and consistent voltage delivery
• 48Wh capacity (4400mAh) restores original battery life to your Latitude E5440
• Integrated protection circuits guard against overcharge, over-discharge, over-current, and short-circuit
• CE, RoHS, and FCC certified for safety and environmental compliance
• 12-month warranty backed by 2-POWER quality assurance

In daily use

Slide this battery into the E5440 and the system recognises it immediately — no driver updates or BIOS tweaks needed. The black casing matches the laptop's underside, so the unit looks factory-fitted rather than an afterthought. Because the cells are new and properly balanced, you can expect the same runtime as when the laptop was first unboxed, even after hundreds of charge cycles. The protection circuitry actively prevents damage from common hazards like leaving the laptop plugged in overnight or using a third-party charger.

Full specifications

• Product Type: Laptop Battery
• Battery Type: Lithium-ion (Li-ion)
• Voltage: 11.1V
• Capacity: 48Wh / 4400mAh
• Number of Cells: 6
• Compatible Brand: Dell
• Compatible Series: Latitude
• Compatible Model: E5440
• Colour: Black
• Condition: New
• Protection Features: Overcharge, Over-discharge, Over-current, Short-circuit
• Certifications: CE, RoHS, FCC
• Warranty: 12 Months

Final note

For a Latitude E5440 that still handles daily workloads, a fresh 2-POWER battery is the most cost-effective upgrade you can make. It brings back the portability and reliability the laptop had on day one.