Don, be careful how much you add
to same circuit! If all the 7 of the devices you named were plugged in and recharging at once, and if each only draws 2 amps, you've just added 14 amps to a wire going back to the main 12v breaker that's only rated for 15 amps in the first place, and may already be carrying 10. I've had experience with this problem...a previous owner of my boat was "12v gadget happy." His idea of how to install 'em was, bolt it down where he wanted it & splice into the nearest wire--without ANY regard for wire size or already existing load. He also didn't see any need to cut any extra length off any wire he spliced in--I must have pulled 2 miles of it out--and before I was done I practically had to rewire the entire boat to unscramble the mess. I hadn't finished the job yet, when one evening not long after I'd gotten the boat running again, I was committee boat...due to VERY light air it was starting to get dark before they'd all finished, so I sent someone to the flybridge with a handheld spotlight to shine sail numbers as they crossed. When he plugged it into the chartlight receptacle ("cigarette lighter" plug), the starboard engine turned over! I let my mechanics solve that one.
