Anyone know how the current is regulated to the 12V (cig lighter) socket on the central console? I bought a little USB charger that fits into the 12V socket. It has a blue light that is always on, which suggests that there is some power constantly to the socket, whether the key is in or not, and whether or not the engine is running. However, my phone only indicates that it is getting a charge when the ignition is on but the engine is NOT RUNNING. As soon as the engine is running, the charging indicator on the phone goes off - to come on again when I switch the engine off on coming to rest. That is totally counter-intuitive to me. Any ideas?