The socket is the same. The heating element in the actual cigarette lighter is different between 6v and 12 volt.
I use mine to charge phones, ear pods and previously an old Garmin GPS unit. I fused the lighter socket at 5 amps to support these smaller loads and then ripped the heating element out of the lighter to insure someone wouldn't push it in which would cause the small fuse to blow.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
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