My car charges in 2 hours and 5 minutes from empty.
Modifications to your car can not void the warranty on the entire car.
They can void the warranty on a specific part that you modified. Thus Ford is not going to warranty the AGM battery, that is up to the manufacturer of the battery.
The AGM battery that I installed required removing the battery tray from the trunk and sawing the end off of it to allow the battery to fit. This was in 2013. Several years later someone mentioned that he had found and AGM battery that would fit without any modifications. Read the battery section here from beginning to end. My instructions for making the modification are there.
The dash cam is plugged into the forward most 12 volt power port. The wire is routed under the headliner across the top of the windshield, down the A pillar, under the dash to reach the center console.
I also added an XM radio that has a lifetime subscription (no longer available) with the antenna lead routed under the back seat, into the trunk, and up to the roof just behind the regular radio antenna. Which reminds me, I removed the "stick" antenna and installed a shark fin antenna.