I'd hazard a guess that is because not all 'cigarette lighter' plugs and sockets are created equal. I worked for a company that made cellphone chargers and acquired many different plugs, few of which were a snug fit in the Morgan 'lighter' socket. In any event, these rechargeable LED 'torches' will always be draining the vehicle battery slightly as the outlet is permanently live. My advice - just buy a cheap LED torch form Deals Extreme. One thing I did to make my Plus 8 a bit more functional at night was hook up the illumination on the socket using a splice from the instrument lighting.
