Dell RJ40G 63Wh 4-Cell Li-Ion Notebook Battery for Latitude 5520

Field technicians and office professionals rely on the Dell RJ40G to keep their Latitude 5520 running through long shifts without hunting for power outlets. This genuine Dell battery delivers 63Wh of energy from four lithium-ion cells, so you can work from morning meetings to evening reports on a single charge.

Key specifications

• Battery type: Lithium-Ion (Li-ion)
• Number of cells: 4
• Energy capacity: 63 Wh / 3941 mAh
• Nominal voltage: 15.2 V
• Manufacturer: Dell
• MPN: RJ40G
• Condition: Original / Genuine Dell
• Rechargeable: Yes
• Installation type: Internal
• Colour: Black
• Safety features: Overcharge protection, over-discharge protection, short circuit protection
• Compatible Dell Latitude series: 5400, 5401, 5410, 5411, 5500, 5501, 5510, 5511, 7300, 7400, 7500, 7600
• Compatible Dell Precision series: 3540, 3541, 3550, 3551, 3560, 3561

Why choose it

As an original Dell component, this battery is engineered for perfect fit and reliable performance. The 63Wh capacity provides extended runtime, and built-in safety circuits protect against overcharging, deep discharge, and short circuits, ensuring long-term durability.

Ideal use cases

• Business travel and remote work
• On-site service and field operations
• Replacing a worn-out original battery
• Keeping a spare for uninterrupted productivity

Good to know

This battery is designed for internal installation and is compatible with a wide range of Dell Latitude and Precision models. It is a genuine Dell product, not a third-party replacement, guaranteeing quality and compatibility.