HP 6-cell, 55 WHr, 2.8 Ah Battery

The HP 6-cell 55 WHr 2.8 Ah battery is a replacement power unit designed for select HP laptops. It uses Lithium‑Ion technology to deliver a rated capacity of 55 WHr (2800 mAh) in a compact 6‑cell format. The battery is finished in black and provides a direct swap option for compatible ProBook models, restoring mobile run time and allowing continued use of the laptop away from mains power.

Advantages

This Lithium‑Ion battery offers stable voltage output and predictable discharge characteristics, supporting typical laptop power management systems. With 6 cells and a 55 WHr energy rating, it balances capacity and weight for everyday mobile use. The design aligns with original equipment geometry to fit user-replaceable compartments and maintain reliable electrical connections.

Suitable for

• Replacing a worn or failing battery in compatible HP ProBook laptops
• Extending unplugged working time for office tasks and web browsing
• Carrying as a spare for travel or field work where mains power is unavailable

Key specifications

• Battery type: Lithium‑Ion (Li‑Ion)
• Cell configuration: 6‑cell pack
• Nominal energy: 55 WHr
• Rated capacity: 2800 mAh
• Colour: Black
• Intended use: Internal removable laptop battery

How to use

Power down the laptop and disconnect any external power source before replacing the battery. Remove the service cover or release the battery latches according to the laptop manufacturer's instructions, then remove the old battery and insert the replacement until it clicks into place. Reattach the cover, connect AC power and allow the system to detect the new battery. Calibrate the battery charge reporting if required by the operating system or manufacturer guidance.

Recommendations

Store and use the battery within the temperature range specified by the laptop manufacturer. Avoid exposing the pack to extreme heat or moisture. For optimal lifespan, cycle the battery periodically and do not leave the battery at full charge or fully discharged for extended periods. Dispose of the battery in accordance with local regulations for lithium‑ion batteries.