Battery pack HP Pavilion 15-CS1007NB L11421-2C1 11.34V 3440mAh (replacement)

Rechargeable battery pack compatible with HP Pavilion 15-CS1007NB laptops. Rated at 11.34 V and 3440 mAh, this replacement battery restores portable power for everyday mobile use and helps extend operating time between charges. Designed as a direct substitute for the original internal battery, it supplies the voltage and capacity required to run standard laptop functions and maintain system stability during typical office, study and travel scenarios.

Advantages

This replacement battery provides the nominal voltage and capacity needed to return usable runtime to a Pavilion 15 series laptop. It is engineered to fit the device’s battery bay and connect to the existing power management circuitry without modification. The unit supports normal charge–discharge cycles and is compatible with the laptop’s built-in charging system, enabling straightforward swapping of depleted packs. Its rated capacity offers a practical balance between runtime and size for everyday productivity tasks.

Suitable for

• Restoring battery life on HP Pavilion 15-CS series laptops
• Daily office work and web browsing away from mains power
• Student use for lectures and study sessions
• Business travel and mobile presentations
• Replacing an aged or failing internal battery to recover runtime

Key specifications

• Rated voltage: 11.34 V
• Rated capacity: 3440 mAh
• Chemistry: rechargeable lithium-based battery
• Form factor: internal laptop battery pack sized for Pavilion 15 series
• Typical use: supports standard laptop power and charging circuits

How to use

Power down the laptop and disconnect the mains adapter before replacing the battery. Access the internal battery bay according to the laptop manufacturer’s service instructions, remove the old battery connector carefully, and install the replacement pack ensuring secure electrical connection and correct orientation. Reassemble the laptop, connect the mains adapter and allow the new battery to charge fully before relying on battery-only operation. If unsure about disassembly, consult professional service or authorized repair resources to avoid damage.

Usage recommendations

For best results, calibrate the new battery by charging it to full and then discharging to a low level once or twice during the first few cycles. Keep the laptop and battery in moderate temperatures and avoid prolonged storage at full charge. Replace only with compatible packs to ensure safe operation and consistent performance.