Battery pack HP L11421-2D2 for Pavilion 15-CS1007NB, 11.34V 3440mAh

Rechargeable battery pack L11421-2D2 is a direct replacement power unit designed for HP Pavilion 15-CS1007NB laptops. With a nominal voltage of 11.34V and a capacity of 3440mAh, this battery pack restores portable runtime for everyday computing, travel and work away from mains. It supports standard charging through the laptop's built-in charging system and is intended to match the physical fit and electrical characteristics of the original unit to ensure compatibility and safe operation.

Advantages

The battery pack delivers a balance of capacity and voltage suited to mainstream laptop use, providing extended operating time compared with depleted cells. As a replacement component built to original-fit dimensions, it offers straightforward installation without modification. The battery is engineered for regular charge/discharge cycles and includes internal safety measures typical for laptop packs to help protect against common faults during normal use.

Suitable for

• Replacing a worn or failing battery in HP Pavilion 15-CS1007NB
• Extending mobile runtime for office tasks, web browsing and video playback
• Maintaining productivity during travel or in locations without immediate access to mains power
• Using as a spare battery for field work or temporary workstation setups

Key specifications

• Nominal voltage: 11.34 V
• Rated capacity: 3440 mAh
• Chemistry: rechargeable lithium-based cell technology (typical for laptop packs)
• Form factor: multi-cell internal laptop battery designed for 15-inch Pavilion series
• Interface: standard laptop battery connector compatible with the specified Pavilion model

How to use

Power down the laptop, disconnect the charger and follow the manufacturer's procedure for battery removal — typically removing the bottom cover or battery access panel and detaching the external connector. Install the replacement battery by seating it in the compartment and reconnecting the connector firmly before reassembling the access panel. After installation, connect the AC adapter and allow the system to recognize and charge the new pack; it is normal for the battery to undergo initial charge cycles. Follow on-screen battery management utilities or the laptop's BIOS/UEFI settings to verify correct detection.

Usage recommendations

Use the battery with the specified HP Pavilion model only. Avoid exposing the pack to extreme temperatures, liquid ingress, or physical shock. Charge using the original AC adapter or a compatible charger approved for the laptop. If the battery shows swelling, overheating, unusual odor or fails to hold charge, discontinue use and replace it following proper disposal regulations for rechargeable batteries.