12-06-14, 10:33 AM
I've got a female cigarette lighter socket in the storage space under the seat, wired to the ignition circuit. This has a male 12V-to-USB plug with a long USB lead that goes under the tank and is screwed onto the dash. I use this to power my iPhone Satnav. I've never needed to use the actual cigarette lighter socket but if I did it's there under the seat. I don't worry about the waterproof aspect as the plug is practically hidden. Cost about £6 in parts.
Eagles may soar, but weasels don't get sucked into jet engines...