I need a bit of advice please. My phone is constantly discharging when plugged into either 12V socket of my new Focus Mk III. I've tried a variety of chargers and cables (up to 2.1 amps), and in all instances, while the phone correctly reports that it's plugged into an AC power source, it discharges faster than it charges. It charged with no problems in my previous car, and it charges fine even when connected to a USB port on a PC.
Any thoughts? It seems to me that the car is limiting the current that the phone can draw, but this would seem odd. Could it be a fault with the car?