Originally Posted by SimonV
I think everyone is reading into this to much, all you need is a car 12v cigar lighter, two wires and costing less than 25 bucks. Go with 6 gauge wire you will have less voltage drop, an extra Battery would not hurt as you sound like you like gadgets.
Exactly. Add a lighter plug. You'll want it anyway. It's good to have one in the cabin and one in the cockpit. Then buy a $10 lighter plug to USB charger. You certainly don't want to use AC power to charge your phone, that's terribly inefficient.
If you still want AC then you could buy a cheap inverter to carry around that plugs into the new lighter plug outlet. I do exactly this however I've never needed the inverter. The lighter plug gets used a lot.
My only comment is that 6awg wire is way overkill. Lighter plugs are only rated for about 10A max.
This is what my new panel looks like with a dual usb charger plugged into the lighter plug socket