Dell RJ40G Replacement Battery for Dell Latitude 5420 / 5520 / Precision 3560 Series

Product Description

• Replacement lithium-ion rechargeable battery
• Compatible model: Dell RJ40G battery series
• 3-cell / 4-cell internal battery variants available
• Voltage: 11.4V (42Wh) or 15.2V (63Wh) depending on version
• Capacity: 42Wh (~3500mAh) or 63Wh (~3900–4100mAh)
• Built-in protection against overcharge, overheating, and short circuit
• Stable power output for business laptops
• Designed for internal installation in Dell Latitude and Precision series
• Dell RJ40G battery is a replacement internal battery used in modern Dell business laptops, mainly the Latitude 5420, Latitude 5520 and Precision 3560 series. It is designed to restore original battery performance in systems experiencing fast drain, charging failure or reduced backup time. The battery exists in two main versions: a 42Wh 3-cell (11.4V) and a 63Wh 4-cell (15.2V), so correct matching is important before replacement.

Specifications