Charging iPhone in car.
Is it wise to use the car's USB socket to charge an iPhone.
It’s generally “safe” but it can sometimes cause unanticipated / undesired behavior of your phone. (The phone “thinks” it’s connected to an “output” which you might not yet have configured - or which doesn’t work all)
Car manufacturers are notorious at causing phone incompatibilities.
Also, some car manufacturers provision the bare-minimum power output resulting in painfully slow charging.
Use of a quality, in-car DC power adapter will ensure always-consistent charging performance in ANY vehicle.
One example: