I got the impression that a regular iPhone charger can charge the iPhone and the iPhone won't become too hot while charging, and the charging time is standard, but if using the 10W iPad charger to charge the iPhone, then it is 2A and it can make the iPhone hotter while charging and the charging time will be less?
I = V / R, so
V is the same at 5V, and
R is the same, so it seems like
I should be the same, and it shouldn't affect charging time or making the iPhone become hotter?
Unless if the standard iPhone charger outputting 5W is below the required power, and so it is charging with a lower than needed power, so when the iPad charger is used, then now more current will in fact go through, and so up to a point, when a 50W, 100W, or 300W charger is used, it will all be the same?