DELL KNM09 Replacement Battery for Notebooks

The Dell KNM09 3-cell lithium laptop battery provides portable power with a capacity of up to 42 WHr. Designed for compatibility with a range of Dell laptops, this black battery is intended to restore or extend run time so the laptop remains operational when away from mains power.

Advantages

This lithium battery is built to match OEM performance and deliver stable power for everyday laptop tasks. Its 3-cell design offers a balance between capacity and weight, while the black casing matches the original equipment aesthetic. The battery is a direct replacement option for compatible Dell models and helps avoid unexpected shutdowns during mobile use.

Suitable for

• Replacing a worn or failed battery in compatible Dell laptops
• Extending mobile working time for travel or remote use
• Maintaining reliable power for basic office tasks, web browsing and media playback

Key specifications

• Manufacturer: Dell
• Model / MPN: KNM09
• Battery type: Lithium, 3-cell
• Capacity: up to 42 WHr
• Colour: Black
• EAN: 5706998802293

How to use

Ensure the laptop is powered off and disconnected from mains power before removing the old battery. Follow the laptop manufacturer's instructions to unlock and remove the existing battery, then insert the Dell KNM09 battery until it clicks into place. Reconnect mains power and charge the battery fully before first use. Verify system battery status in the operating system after installation.

Recommendations

For best results, use the battery within the operating temperature range specified by your laptop manufacturer, avoid deep discharges when possible, and store the battery at partial charge if not used for extended periods.