I can't seem to get the front USB ports to charge... it charges for a few seconds, then stops, then charges, then stops, then charges, then stops... like the USB supply in the car is so appallingly wimpy that charging a phone overloads it. First tried it with an Anker PowerLine 1-foot MicroUSB cable, since I didn't have the Tesla MicroUSB cable yet (thanks for the Lightning and USB-C but you missed the most common one ). Just got the Tesla cable today and ... wow! Same problem, same thing, can't charge my phone in the car. Couldn't Tesla have just worked with Anker on integrating a reliable, powerful dual-port QC3.0 USB power supply in the car? Sigh. Anyone have the same problem or should I (try to) take my car in for service (already)?