Battery HP ProBook 645 G3 ProBook 655 G3 801554-002

The HP 801554-002 battery is a replacement power unit compatible with HP ProBook 645 G3 and ProBook 655 G3 laptops. It uses Lithium‑Ion technology and provides a capacity of 4210 mAh in a black housing, designed to restore mobile work time and maintain stable power delivery under typical office and travel use. The unit meets HP mechanical and electrical fit requirements for the specified ProBook models and enables straightforward installation without special tools.

Advantages

This Lithium‑Ion battery delivers consistent voltage and recharge cycles for reliable day‑to‑day operation. With a 4210 mAh capacity it offers extended runtime compared with heavily worn cells, helping to reduce the need for frequent charging. The battery is designed to match the form factor and connector placement of compatible ProBook models, ensuring simple installation and secure fit. The black finish maintains the original look of the laptop.

Suitable for

• Replacing a depleted or failing battery in HP ProBook 645 G3
• Replacing a depleted or failing battery in HP ProBook 655 G3
• On‑the‑road productivity where mains access is limited
• Office and home use to extend unplugged working time

Key specifications

• Battery technology: Lithium‑Ion (Li‑Ion)
• Nominal capacity: 4210 mAh
• Compatible laptop models: HP ProBook 645 G3, ProBook 655 G3
• Colour: Black
• Form factor: Internal replaceable notebook battery designed for the specified ProBook series

How to use

Power down the laptop and disconnect the AC adapter before replacing the battery. Remove the service cover or battery access panel of the ProBook model following the manufacturer’s instructions, disconnect the old battery from its connector, and install the replacement by aligning the housing and securing any screws or latches. Reattach the access panel, connect the AC adapter, and allow the new battery to charge to full capacity prior to first full use. Check battery status via the operating system power utility to confirm successful installation.

Recommendations

To maximize battery life, avoid exposing the laptop to extreme temperatures, perform occasional full charge/discharge cycles, and use official or manufacturer‑recommended chargers. If the device will be stored for extended periods, store the battery at approximately 40–60% charge in a cool, dry place.