DELL FJJ4W laptop spare part Battery

The DELL FJJ4W 9-cell lithium-ion battery provides high-capacity portable power for compatible Dell laptops. With a rated capacity of up to 97 WHr (8500 mAh) and a black finish, this replacement battery is intended to restore mobile runtime and reliable operation for systems that support the FJJ4W model.

Advantages

This lithium battery offers extended runtime compared with lower-capacity packs, uses the manufacturer-specified form factor for straightforward installation, and maintains stable power delivery for typical laptop workloads. Its 9-cell design balances energy density and compatibility for systems that accept the FJJ4W part.

Suitable for

• Replacing a worn or failing Dell FJJ4W laptop battery
• Extending unplugged runtime for travel or mobile work
• Maintaining device availability for on-site or field use

Key specifications

• Battery technology: Lithium-ion
• Cell configuration: 9-cell
• Capacity: 8500 mAh (up to 97 WHr)
• Compatible model / MPN: Dell FJJ4W
• Colour: Black

How to use

Shut down your laptop and disconnect any power source before removing the existing battery. Slide or unfasten the battery retaining latches, remove the old battery, and install the DELL FJJ4W battery in the same orientation until it locks into place. Reconnect AC power and charge the new battery fully before first use, then power on the laptop and verify battery status in the operating system.

Recommendations

Follow the laptop manufacturer’s safety instructions. Use only compatible chargers and avoid exposing the battery to extreme temperatures or moisture. If the battery shows signs of damage, swelling, or abnormal heating, stop using it and replace it immediately.