Extra Digital Advanced NB441921 Replacement Laptop Battery for Dell 4GVMP (8000mAh, 11.4V, 6-Cell, Li-ion)

With a massive 91.2Wh energy reserve and 8000mAh capacity, the Extra Digital Advanced NB441921 keeps your Dell laptop running through marathon workdays and long flights without hunting for a power outlet.

Overview

The NB441921 is a high-capacity 6-cell lithium-ion battery engineered to restore peak performance to compatible Dell Latitude and Precision laptops. It replaces Dell part numbers 4GVMP, 04GVMP, 0W8GKY, W8GKY, 0X77XY, X77XY, 0N7HTV, and N7HTV, ensuring a perfect fit and seamless integration. Whether you're replacing a worn-out original or keeping a spare on hand, this battery delivers the dependable power your mobile workflow demands.

What stands out

• High capacity 8000mAh / 91.2Wh for extended unplugged work sessions
• Multiple safety features: overcharge, over-discharge, over-current, and short-circuit protection
• Certified to CE, RoHS, and FCC standards for peace of mind
• Reliable cycle life of 500+ charge cycles, reducing replacement frequency

Technical details

• Battery Type: Lithium-Ion (Li-ion)
• Voltage: 11.4V
• Capacity: 8000mAh
• Cells: 6-cell
• Colour: Black
• Compatibility: Dell Latitude 5400, 5410, 5500, 5510; Precision 3540, 3550
• Replaces Part Numbers: 4GVMP, 04GVMP, 0W8GKY, W8GKY, 0X77XY, X77XY, 0N7HTV, N7HTV
• Operating Temperature: 0°C to 45°C
• Cycle Life: 500+ cycles

Our verdict

For a reliable, high-capacity replacement battery that meets or exceeds original specifications, the Extra Digital Advanced NB441921 is an excellent choice. Its robust safety features and long cycle life make it a smart investment for extending the usability of your Dell laptop.