I had thought about using a power distribution block and going back to the battery, but wasn't able to find an access point through the firewall... and I spent a few hours looking for one when I was wiring up my LED light bar (I ended up with all the wiring for that done under the hood, using a harness that included a wireless switch). It was in my search for a firewall pass-thru that I came across the harness for the optional power inverter, and I figured that would be good for connecting power outlets, since it's already fused, and I figure that the inverter would draw more power than a couple phones would. I've had the console out a few times since I installed them and the wiring is fine so far. And I have not had any noise or interference with the radio, but I'm running an X-Trons Android head unit, not the factory unit.
2014 Patriot Sport FDII
2015 Honda NC700XDA