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Have all the necessary tools according to elsawin..

My 2007 model had a permanently live socket. I don't know about later models. A permanently live socket was fine when used for its original purpose of lighting a cigarette: current only flowed for 20 seconds, so there was no significant drain on the battery. Nowadays it is often labelled as an auxillary power socket, and is used for all sorts of electronic gadgets which might draw power continuously. The consumption of a phone charger is small and will stop when the phone is fully charged, but there has been a case on this forum of a dashcam draining the car battery because it continued operating after the ignition was switched off.

Thanks Corrina, If you don’t actually connect the phone to the charger then it just isn’t an issue - no current consumption at all - even though the charger is plugged in. It’s rather like your light switch at home. That’s permanently live, but current doesn’t pass through it until you switch the light on. If you do actually leave your phone on-charge in the car when the engine isn’t running then even then the current consumption would be very low. I think you have an unnecessary concern - If I understand it correctly. Kind regards, Gareth.

It will tell you on the sticker in the log book like this.