Features
Size (imperial)	2.5"
Type	Carrier panel
Number of HDDs supported	1
HDD interface	Serial ATA
Material	Metal
Compatible products	HP EliteBook 725 G3, 745 G3, 755 G3, 820 G3, 840 G3, 850 G3
Logistics data
Harmonized System (HS) code	84733080
Weight & dimensions
Height	7 mm

The HP HDD hardware kit 821665-001 is a Carrier Panel for 2.5-inch hard drives, designed for installation in selected HP EliteBook notebook models. It serves as a mechanical holder and enables the installation and replacement of SATA hard drives within the notebook housing. The panel is made of metal and has a height of 7 mm, making it suitable for use in the specified devices. The maximum supported number of hard drives is one, making it a single-slot solution.

Applications

The Carrier Panel is specifically intended for the HP EliteBook 725 G3, 745 G3, 755 G3, 820 G3, 840 G3, and 850 G3 models. In these devices, it is used to securely fix a SATA hard drive within the housing, ensuring stable mechanical anchoring. Its use is part of system upgrades, repairs, or replacement procedures where a hard drive must be integrated into the notebook.

Functions and Equipment in Detail

The panel provides mechanical fixation of the hard drive and ensures that it does not vibrate or become loose during operation. It is designed for SATA interfaces, enabling connection to the internal data and power supply of the notebook. The height of 7 mm corresponds to the standard for 2.5-inch hard drives in notebooks and ensures a precise fit without additional modifications.

Technology Explained Simply

A Carrier Panel is a mechanical holding element used in notebooks to securely fix hard drives within the housing. It prevents mechanical damage caused by vibrations or movements and ensures that the hard drive correctly fits into the mounting holes of the notebook housing. The SATA interface enables data transfer and power supply via a single cable, simplifying internal cabling in the device. The panel itself is not an electronic component but purely mechanical and serves exclusively for fixation.

Compatibility and Accessories

The Carrier Panel is exclusively designed for the specified HP EliteBook models (725 G3, 745 G3, 755 G3, 820 G3, 840 G3, 850 G3). It is not intended for other devices or other hard drive types (e.g. NVMe SSDs).

Installation and Mounting

Installation is performed by inserting the hard drive into the Carrier Panel and then placing it into the designated slot in the notebook housing. Fixation is achieved using the pre-drilled screw holes in the device. Mounting does not require special tools, although a screwdriver is required to tighten the mounting screws.

Operational Advantages

The Carrier Panel ensures stable and secure mounting of the hard drive in the notebook, increasing system reliability. The use of metal as the material provides high mechanical strength and prevents displacement of the hard drive during operation. The precise fit for the specified HP EliteBook models reduces the risk of installation errors and enables quick replacement or upgrade of the hard drive without additional modifications.