Ok so today I installed a universal cigarette lighter straight into the battery. It works so far but havnt tried it while the engine is running (shouldn't make a difference no). Question is, I currently in plugged it but if I left it and the cigarette lighter seems to get quite warm (without any attachments inside) and has a light running on it, will it drain my battery an/or blow with excess power? Does that make sense? I am thinking of installing a switch but to be honest, if I had bought one off the shelf it would of cost me about 2 quid more....would of been worth it lol!