HP 849958-001 Slim ODD power dongle is a cable adapter for supplying power to a slim optical disk drive. It is a small service part intended for a drive power connection, rather than a general-purpose power accessory.
The dongle measures 300 mm. That length provides a defined cable reach for the drive connection while keeping the part specific to slim ODD power. The exact part reference is 849958-001, identifying this HP component in parts listings.
Use it as the power dongle for a slim optical drive where this exact part is specified.