Dell 7P3X9 3-Cell 43Wh Li-Ion Laptop Battery for Inspiron 15 5547/5548, Latitude 3450/3550

When your Dell Inspiron 15 5547 runs out of juice mid-presentation, this 3-cell 43Wh battery keeps you going. It's the original OEM unit (part PXR51) that shipped with select Inspiron and Latitude models, so it fits perfectly and communicates charge status accurately with the system. Swap it in, and your laptop is back to full mobility.

Key specifications

• Battery technology: Lithium-Ion (Li-Ion)
• Number of cells: 3
• Energy capacity: 43 Wh
• Current capacity: 3.84 Ah
• Nominal voltage: 11.1 V
• Rechargeable: Yes
• Condition: New
• OEM status: Original Equipment Manufacturer (OEM)
• Form factor: Internal
• Product colour: Black
• Compatible with: Dell Inspiron 15 5547, Inspiron 15 5548, Latitude 3450, Latitude 3550

Why choose it

As an OEM battery, it meets Dell's original specifications for safety, performance, and longevity. You avoid the risks of third-party cells that may not fit or report charge incorrectly. With 43Wh, you get a balance of weight and runtime—enough for several hours of typical use, yet light enough to keep your laptop portable.

Ideal use cases

• Replacing a worn-out battery that no longer holds a charge
• Keeping a spare battery for long flights or fieldwork
• Restoring a used laptop to full functionality for resale
• Ensuring consistent power for business travel or remote work

Good to know

Installation is straightforward: power down, remove the bottom cover, unplug the old battery, and connect the new one. No special tools are required beyond a small Phillips screwdriver. Always calibrate the new battery by fully charging and discharging once or twice for optimal performance.