I hard-wired my GPS mount to a switchable source, that way when I turn the ignition on the GPS comes on. There are lots of 'switchable', choices on the V.
I have a cig lighter for my 12volt pump and cell phone charger. Its under the seat and directly wired to the battery via a fuse.
If I have another flat and have to use the 12v pump, I don't want to have the ignition on and risk running the battery down.
I have a two pronged side by side plug (not sure what its officially called), but the female cig socket plugs into that, so anything with a car charger plug can easily be used.
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