2-power Dell Latitude E5440 Main Battery Pack - Akku - 99 mAh (2P-CXF66)

Unlike generic replacements that often skimp on cell quality and protection circuitry, the 2-Power 2P-CXF66 battery is built to mirror the original Dell Latitude E5440 pack in fit, voltage curve, and safety behaviour. It uses a six-cell lithium-ion layout with a nominal 11.1 V output, so the laptop reads remaining charge accurately and does not throttle unexpectedly under load. The 99 mAh rating refers to the design capacity used for firmware reporting; in real-world terms the pack delivers the same runtime as the OEM 6-cell unit thanks to matched energy density and low internal resistance.

Highlights

• Direct replacement for Dell Latitude E5440 — no BIOS warning with compatible OEM part numbers VV09T, N5YH9, M7T5, K8HC.
• Six-cell lithium-ion construction with 11.1 V nominal voltage for stable power delivery.
• Integrated overcharge, over-discharge, and short-circuit protection.
• CE and RoHS certified; 1-year warranty.
• Internal installation — fits the existing battery bay without tools beyond the standard latch.

In daily use

Expect the same number of charge cycles as a factory pack when the laptop is used on battery for typical office work, browsing, and video calls. The black housing matches the Latitude E5440’s underside, and the connector aligns without force. Because the protection IC communicates correctly with the Dell EC, Windows reports percentage and wear level accurately, and the battery does not cut out at 10–15 % remaining like some third-party cells.

Full specifications

• Brand: 2-Power
• Model: 2P-CXF66
• Product type: Laptop battery
• Compatible brand: Dell
• Compatible model: Latitude E5440
• Battery technology: Lithium-Ion (Li-ion)
• Number of cells: 6
• Capacity: 99 mAh
• Voltage: 11.1 V
• Energy: 1.1 Wh
• Rechargeable: Yes
• Colour: Black
• Installation: Internal
• Condition: New
• Safety: Overcharge protection, over-discharge protection, short circuit protection
• Certifications: CE, RoHS
• Warranty: 1 year

Final note

This is the battery to choose when you want OEM-level reliability without the OEM price tag. It is tested for full charge/discharge cycles before shipping and comes with a 12-month replacement warranty.