it felt really loose and was getting nothing - its pretty old does say "shavers only", so just used the 12v adapter i had and its powered up and working fine now so i just need to wait for the MAC address update to go through to give it a go.
Also anyone know of any firmware / software updates that might need applying on a brand new 254? In settings there is a Autoupdate option which is set to Disabled as default, worth turning it on?