The cable connecting Vision Pro’s battery to the headset appears fixed but can be removed if necessary.

Reporter Ray Wong used a SIM-eject tool to release and remove the battery cable. A small hole beside the cable appears to contain a locking mechanism.
The battery cable resembles Lightning, but has too many pins to be a Lightning connector. It is proprietary and cannot be used with other accessories or for other purposes.
A detachable cable would allow replacement if damaged without replacing the entire battery.